I welcome you too.

I support your new interest and undertaking with the issue of cryptocurrency.

I'll be happy to advise. I don't consider any exchange safe and would recommend keeping your funds in them only for a very short time and the smallest amounts. If you have to choose, then the preference would be left on one of the top exchanges, because the more resources they have, the better the security system can be built. But of course, this doesn't give any guarantees and a gap in security can always be found.

I consider the issue of convenience to be purely individual, and in order for you to determine which particular exchange will be convenient for you, you can't do without personal experience. Try several options and choose. Why ask others what will be convenient for you. Outside advice won't help here.