fight speed & accuracy training. coordination bag?

[Ehsan_Karam]

Problem is, all the bad habits you teach yourself, will have to be unlearned later. Heavy bag is the best thing to have at home IMO, but only useful after you have good punching and kicking tech. I have no idea what your technique looks like, but if you have not spent a good deal of time in a boxing/kickboxing/similar gym under a qualifed instructor it most likely sucks, and a heavy bag tends to make that worse to a degree.

This is DEAD ON. Take this to heart. Technique, Technique, Technique. I'd really recommend shadow boxing as well.
Make sure your punches are coming straight out at shoulder level or a bit above and coming right back to your chin.