Google, Amazon, and Microsoft are just 3 places you can host from. If this is a personal website that’ll likely have low traffic, search for lowendbox. Tons of cheap hosting is available that isn’t big tech.

Do you really think this? That a big tech company would have an interest in the content of a personal blog of such?

Your mail goes where your MX records point. Microsoft will only see the mail if you move your mail to exchange.