No offence but I doubt you are as good as you think you are. Join a club, I bet you will be surprised how much you do not know and what you have been doing wrong. Sparring with your a friends who I presume aren't boxers seems to have given you a poor sense of how good you really are, just because you watch videos and try to imitate what is happening doesn't mean you are doing it right and there lies the danger of not haveing a coach. You are probably picking up bad habits from copying videos and there is no coach to correct you. I did this once, where I watched a video and tried to copy it. I later found out I was doing it wrong when I joined a club. Five months in and I'm still no where close to being ready for an Amateur fight nevermind a pro one. Although that is mostly down to fitness there is still loads of technique to work. In short: You aren't ready, Go to a gym.
:good Casual fans don't seem to realise that most things in boxing are very hard to master and that it's actually a very technical sport
I wish I had some bums to get confidence against rather than always being thrown in as the underdog ! Tough coaching !