Hi there, I hope you guys don't mind some really newbie questions, since I guess most Amiga users these days atleast recall the basics.. However I just bought my first Amiga. I used my dad's one as a kid, and when I saw one at a recent gaming exhibit I had to get one. It's a second hand A500 and I'm really excited about it, but I don't really know what to do with it.
Some of my problems are software related sorry for putting them here but I didn't want to start two threads

Firstly, before I even turn it on, I'd like to clean it, open her up and get any dust out, and to check for any problems like battry leakage which I head can happen. I'm a little worried about doing this so if there are any tips you can give to prevent me breaking the thing in the process that would be great

I'd also like to 'reformat' it, if that's the right word for this kind of thing, reset it to its original state, you know :roll:
It also came without any software, as far as I know it already has an OS installed, but no kick start disk or anything, and I don't know which OS version is most suitable for this machine.. Would appreciate advice :-D
Lastly, if there are any hardware addons you think are worth getting I'd like to hear them! The more bits and pieces the better (it came with a 512k ram expander installed)
Sorry if any of these questions seem stupid or a bit much, but thanks for any help you can give, eager to explore what this ol' computer can do :-D