Sometimes I am verybecome confused towhen chooseing a topic to write. about.

or

"sometimes I get"

I removed "very" so that it does not repeat too much with the next sentence. If you feel that this changes the meaning of this sentence too much, then you could add a similar word in its place:

rather confused

quite confused

pretty confused

super confused

somewhat confused

But, people here are incredibly helpful, and I am very grateful to God for that.

comma moved to after "helpful" because that is where the coordinating conjunction "and" comes after

you could also try replacing "but" with "however" or something fun like "thankfully"

Whatever mistakes are thethere are in my paragraph, folks here always correct me in positive way.

technically, I think it should say "there may be in my paragraph"

the comma indicates that "folks here always correct me in a positive way" is the main idea, while the other part is nonessential/dependent

Confusedhoosing a topic

As I mention below, "confused" isn't the word I think you're going for here.

Sometimes I am very confusedfind it difficult to choose a topic to write about.

"I am very confused" is a bit too strong here. This expression is used when someone has lost their sense of what is going on, for example:
- "I hit my head and I am very confused," or
- "Everything happened so quickly and I am very confused about what happened," or
- "I am very confused about this math problem" --> meaning you have no idea what the problem means or is saying.

I don't think that's the vibe you're going for here: I think what you're trying to say is that you struggle to find something you want to write about.

But, people hereHowever, the people here on LangCorrect are incredibly helpful and I am very grateful to God for that.

Either you can say "But the people here..." or, as I have done, "However, the people here..." The word "But" followed by a comma (",") is unusual and rarely used.
You don't HAVE to specify it's on LangCorrect because I know what you mean, but I can imagine someone not immediately realising what "here" refers to. ("Is he talking about people in his town? in his country? on the internet?")

Whatenever I make mistakes are there in my paragraph folks here always correct me in positive way.in my writing, the folks here always make positive corrections.

Many ways you can express this. You could also have said:
If there are mistakes in my paragraph the folks here will make corrections in a positive way.

Sometimes I am very confused to choose aunsure about what topic to write about.

You can still use the word "confused" but "unsure" is probably a better fit here. "Confused" is more about not understanding what something is or what something means; "unsure" is having trouble deciding something.

Whatever mistakes are there in my paragraph, the folks here always correct me in a positive way.