Any boxers out there that can give me some starting tips?

So I got a 1.20m, 30kg punching bag, and hung it on the upper floor. I don't have boxing gloves yet but my friend suggested I just use cloth bandages on my hands. I'm looking for a boxing gym near me. I'm open to any striking art but I've done taekwondo before and I'd really like to concentrate on boxing now. I can throw basic punches. I've been watching some videos on boxing basics and I think it's awesome. Anything I could start working on for myself?

I'm already confident in self-defense. I don't have any specific reason to do it other than boxing looks fun. It's something I've been meaning to get into for years.

I'm not in shape at all.

Tips are welcome!