Welcome Kat_from_heavens!
Nice nickname

Yeah, copywriting business is considered to bring nice payments for copywriters. But, first, it's not easy to get there, especially for freelance beginners. Second, as the saying goes, "it's not all gold that glitters" and there are many problems in this field. At least, that's what a friend of mine, copywriter, says of the whole matter.
Anyway, if you want to get into this business, you should make efforts to succeed.
In freelance copywriting it is of essential importance to research the market you want to get to.
I've heard that "The Well Fed Writer" by Peter Bowerman is a very helpful book for freelance beginners.