I don't think you should be focusing on investing or trading bitcoin right now. I mean, if you can't use a bitcoin wallet properly, don't understand what bitcoin is, and aren't sure how you'll protect your money in the long run, then investing or trading should be your least concern.

Learn how bitcoin works, at the very least in the most basic terms, to become comfortable with it before deciding whether or not to invest money in it.
- https://learnmeabitcoin.com/beginners/

It isn't the best investment in general but the safest in terms of cryptocurrency investing.