I want to write a diary with words iI learned today.

so I want to use them.

In casual conversation, this is fine. But "so" is not a word you can use to start a sentence in writing.

I am writing a report with TEDabout TED talks.

Sometimes, I am amazed at many topics in Ted because thesey are interesting.

"Sometimes" usually is added to describe the frequency of something that happens not often, or highlight an unusual event. It feels a bit out of place here.

At first, too many students log inged into the site, so the site didn't allow all students to log in.

After all, I was able to take lectures on PM 2.

Just a bit strange here to say "after all" without discussing what came between. Usually it goes 2 ways:
-After all the work we did, we came in first!
-I hate him. After all, he did eat all my soup.

My school prepared an online system in advance but it was failed.

nNow all students arehave been admitted to the site and I have almost adjusted to (adapt to?)the online lecture system.

Both adjusted and "adapted to" would have been fine!

I can adjust my lecture time and can watch videos adequrepeatedly until I fully understand.

"Adequately" doesn't work here. An adequate number of times works, but it's just too vague on its own.

I think advantage of online lecture is that students don't need to waste time on the road.

But the disadvantage of it is we have to check out attendance everyday and do homework everyat all hours.

I don't understand "check out attendance" here.

For example, if iI have a 3 hour lecture, then iI could get 3 hours of homework.

If we are absent from lectures, we get minus score.

"Minus score"?

So many students docan't afford to get ready for exams.

and WE DON'T KNOW WHEN WE will TAKE EXAMS..

And the government wants to let us go to school.

They always say we have to stay away from others at least 2 mett least 2 meters away from others.

But they want weus to go to school.

And about 10 percent of all patients forbetween 12-29 don't know where they got the virus.

It is terrible... And my school wants to let us go to the school and they don't want to pay us back.

They didn't submit?

Submit... what?

(present?put forward?) any accurate alternative things.

Good! I would just say "measures" instead of things.

So Mmany students and parents made calls in protest calls but schools didn't accept anything.

~accept anything....

Actually I don't know what will happen.. ENot everything don't goes according to plan..

I really don't know why school dwon't accept anything B, but I will act active and advance through this period.