I strongly agree with interacting with people but not just with everyone. If you wanna promote/sell your music you need to target people. To get new fans,the best way is to target people who already like someone similar to you but just a bit better. Lol I don’t mean there is someone better then you but someone better in promoting. Targeting fans of the big names can be risky so don’t shoot too high. It’s also important to choose the right place. Social media are huge these days so no matter if you like it or not Facebook, twitter, youtube are the place to be. And yeah definitely work with others. That gives you exposure and you can learn from each other.