I have understood what I use thand some tenses some: Pprensent perfect, past perfect, future simple, past continues, and present continuous. I understand some tenses: present perfect, past perfect, future simple, past continues, and present continuous.

ButHowever, when I write I fuind that I madke a lot of mistakes about it. However, when I write I find that I make a lot of mistakes.

Usually do not start a sentence with conjunctions like "but" and "and"

What is your advice? What is your advice?

Can also say: What do you recommend? Do you have any recommendations for me?

Thanks a bunch for your corrections. Thanks a bunch for your corrections.

Can also say: Thanks a bunch for your feedback.

I'm really owne you. I owe you.

Can also say: I owe you one.