Recently, I f've beeln fulleeling content and peacefull.

Where I live (Scotland) 'full' means you have eaten a lot of food and don't want anymore. I'm not sure what it's supposed to mean in this context.

I usually work in the mornings, then have a nap.

I usually work for a bit in the mornings, before taking a nap.

UI usually, I lerarn English in the afternoon, including remember words, dowhich includes revising vocabulary and doing a set of IELTS exercises.

After that, I would check the answers and review.

check the answers/mark my work

Before dusk, I will go somewhere I want to explore with my one of my students by bike or on foot.

Quite a complicated sentence. I'd write it like this: 'I'm planning on going exploring before dusk with one of my students, either by bike or on foot.'

SI sometimes, I would spend more than three spend over 3 hours ondoing thatis.

I sometimes think I should cut the time to studystudy instead, but I immediately realise that it's OK, because I have fun of doing thatexploring.

Furthermore, I didn'tIt's not like I do it every day.!

Furthermore is outdated.

It just happens into be a sunny day, which ishas been rare recently.

Before going to bed, I wouldI sometimes keep on studying before going to bed, even though I am tired.

I want to make sure that no matter what the condition is or how my situation ishow I'm feeling or where I'm at mentally, I can take an/pass the exam, because I have an IELTS exam in March.

Condition is quite vague here.

Recently, I feel full and peacefull.

feeling full = not hungry anymore. Maybe you mean you feel complete or fulfilled or satisfied or content?

I work in the morning, then havtake a nap.

Usually, I lerarn English in the afternoon, including remember words, doorizing words and doing a set of IELTS exercises.

After that, I would check the answers and review.

Keep the same tense as before.

Before dusk, I will go somewhere I want to explore with my one of my students by bike or on foot.

Just so you know, "dusk" is used very infrequently. I would instead say "before sunset".
Again, keep the same tense. Why is it always changing?

Sometimes, I would spend more than three hours on that.

Sometimes I think I should cut the time to study time, but I immediately realise that it's OK, because I have fun of doing that.

Furthermore, I didon't do it every day.

Again, tense. You can't randomly go from indefinite to future to future-in-the-past to past. Not unless the setting changes of course.

It just happens ion a sunny day which is rare recently.

I'd prefer saying "...which has recently become rare" even though what you wrote isn't technically incorrect. But the idea that it is only rare recently implies that it has become so.

Before going to bed, I would keep studying, even though I am tired.

I want to make sure that no matter what the condition is or howwhat my situation is, I can take an exam, because I have an IELTSthe IELTS exam, which is in March.

I would replace "what the condition is" with "what happens"

Recently, I have feelt full and peacefull.

Another word you can use instead of full is content and satisfied.

I work in the morning, and then havtake a nap.

Usually, I lerarn English in the afternoon, including remembering words, do and doing a set of IELTS exercise.

Before dusk, I willnight, I go somewhere I want to explore with my one of my students by bike or onby foot.

I think I should cut thespend less time to study, but I immediately realise that it's OKokay, because I have fun of doing that.

Not sure if you mean you should spend less time exploring (spend less time to study) or less time studying (spend less time studying)

It just happens in aon sunny days which ishave been rare recently.

I want to make sure that, no matter what the condition iss are or how my situation is, I can still take anthe exam, because I have an IELTS in March.

Fullness

Perhaps a title such as Peacefulness? Or Completeness? Fullness is normally when you have eaten too much.

Recently, I feel fulllt complete and peacefull.

Should be in the past tense

Usually, I lerarn English in the afternoon, including remember words,ing to do a set of IELTS exercise.

Before dusk, I will go somewhere that I want to explore with my one of my students either by bike or on foot.

I think I should cutdecrease the time toI study, but I immediately realise that it's OK, because I have fun of doing thatstudying.

Furthermore, I didn'ton’t do it every day.

Should be in the present tense

It just happens ion a sunny day which is rare recently.

I want to make sure that no matter what the condition is or how my situation is, I can take anthe exam, because I have anthe IELTS in March.

I would use ‘ the’ as you know what the exams are.

Recently, I feel full and peacefull.

I work in the morning,; then, I have a nap.

Usually, I lerarn English in the afternoon, including remember words, do a set of IELTS exercise, which includes vocabulary and IELTS exercises, in the afternoon.

Before dusk, I will go somewhere I want toould explore with my one of my students by bike or on foot.

Sometimes, I would spend more than three hours on that.

I think I should cut the time to study, but I immediately realise that it's OK,okay because I have fun of doing thatam having fun.

Furthermore, I didon't do it every day.

I want to make sure that no matter what the condition is or how my situation is, I can take an exam, because I have an IELTSthe IELTS exam in March.