This is my first time for me to use lusing Langcorrect. This is my first time using Langcorrect.

The words you have used are absolutely correct, however your tense is incorrect here.

This is first time for me to use lthat I'm using LangcCorrect. This is first time that I'm using LangCorrect.

This is first time for me to use lI am using Langcorrect. This is first time I am using Langcorrect.

I want to overcome this. I want to overcome this.

Great! I will help you wherever possible :)

I want to learn english more (especially for writing and talking, but writing is first for now). I want to learn english more (especially for writing and talking, but writing is first for now).

Technically you can just say "writing first" in this sentence, but either works

I want to learn english more (especially for writing and talking, but writing is first for now)gain proficiency in English. I want to gain proficiency in English.

Don’t be scared after looking at the word ‘proficiency’! It’s a way of saying you want to become better at something and is a great addition to your vocabulary.

I want to learn eEnglish morebetter (especially for writing and talking, but writing is first formy priority right now). I want to learn English better (especially for writing and talking, but writing is my priority right now).

I want to learn eEnglish more (especially for writing and talking, but writing is firstthe priority for now). I want to learn English (especially writing and talking, but writing is the priority for now).

I am living in South Korea and I have learned eEnglish since I was a child. I am living in South Korea and I have learned English since I was a child.

I am currently living in South Korea and Ihave been learned eing English ever since I was a child. I am currently living in South Korea and have been learning English ever since I was a child.

Words used are correct again, but the tense is incorrect.

I am living in South Korea and I have learned et English since I was a child. I am living in South Korea and I have learnt English since I was a child.

"Learned" is American English and "Learnt" is British English; depends on which one you're learning

I am living in South Korea and I learned eEnglish sincewhen I was a child. I am living in South Korea and I learned English when I was a child.

My reading and listening skills are okay (as I think), but I have weaknesses in vocabulary and real-time talking. My reading and listening skills are okay (as I think), but I have weaknesses in vocabulary and real-time talking.

You could say also "talking in real time". I won't say real-time is a natural world to use in this context? You could say "talking on the spot" maybe

My reading and listening skills are okay (as I thinkccording to me), but I havemy weaknesses ins vocabulary and real-time talking.conversing with others My reading and listening skills are okay (according to me), but my weakness is vocabulary and conversing with others

Replace I with my. Real- time talking is a little unnatural though i understand why you may have used this. In this context however, we will using ‘conversing’ which means having a conversation.

My reading and listening skills are okay (as I think), but I have weaknesses in vocabulary and real-time talking. My reading and listening skills are okay (I think) but I have weaknesses in vocabulary and real-time talking.

My reading and listening skills are okay (as I think), but I have weaknesses in vocabulary and real-time talking.talking in real-time. (Making conversation) My reading and listening skills are okay (I think), but I have weaknesses in vocabulary and talking in real-time. (Making conversation)

I will write anything for my personal practice, but itI would be grateful if anysomeone wriote any feedback to me. I will write anything for my personal practice, but I would be grateful if someone wrote feedback to me.

This was a great sentence!

I will write anything lot for my personal practice, but itI would be grateful if anyone could write any feedback tofor me. I will write a lot for my personal practice, but I would be grateful if anyone could write any feedback for me.

I will write anysomething for my own personal practice, but it would be grateful if anyone write anysomeone could provide me with feedback to me. I will write something for my own personal practice, but it would be grateful if someone could provide me with feedback.