personally I would say spend about $300 on a decent used guitar, $99 guitars are shit and can make a professional player sound bad
The best thing you can do is try and play by ear, reading music is fine but having an ear for it is far better
Start out with the basics like tuning and other basic fundementals of music
Unless your a natural its a slow progression to the point of where you want to get to, it takes alot of practice and a ton of determination
Good luck!