Lol. No big deal. It’s the sort of thing your eyes skip over when checking your grammar.

As a non native am keenly aware of every mistake i make. Sometimes, i fix the same text 4 or five times in row.

Should be

As a non native I’m keenly aware of every mistake I make. Sometimes, I fix the same text 4 or five times in a row.

Two of the mistakes were just capitalization of ‘I’.