It's always better to have qualified coaching than self training.
When I was like 15 I found out the (fitness) gym I went to had a room with two heavybags in it and a box of assorted gloves. I would work that in to all my workouts, and watch instructional videos on youtube before each workout. I had a friend film me once and realised how terrible I looked.
when you get a bunch of weirdos from around the internet talking about guys beating each other up, shit gets weird.
Never let facts get in the way of your hate - First rule of Sherdog