Hi. I mostly play 5A. I think it’s a good idea to switch between styles when you feel bored or like you’re not making much progress. Steve Brown said something like that before; that learning everything helps you learn everything else, or something like that.
To answer your questions:
I like 5A more than 1A because I like having to focus on both the counterweight and the yoyo moving at the same time. It also feels more acrobatic than 1A. Not that 1A can’t be acrobatic, it just seems more technical and dense than 5A, most of the time.
I don’t know if I would say that it’s easy to get into. I think it just depends on your ability to focus on two things, and understand the paths they both have to follow to accomplish a trick.
You will for sure sure hit yourself a lot. Maybe not right away with basic stuff, but as you improve and you get things to move faster, it’s going to happen.
Have fun. Make sure your string is an appropriate length, it’s harder to get things to move with the right timing if your string is too long. Basically, if you’re having a tough time pulling things together, try shortening your string a bit.
That’s all I can think of. I know it’s really long. Hopefully it’s as helpful as it is long, and if not, hopefully it’s easy to skip.