A few things to suggest -
Check out AzCDL's site. In particular their accomplishments page. Nearly all of the gun freedoms we enjoy hers in AZ can be traced back to them. If you're not a member, think about joining.
People may be curious and ask questions, considering your age. Be polite, smile and have a response ready in your head. You'll get the standard questions like: Is that real? Are you undercover? Are you a cop? Is that legal?
Now a word about appearance - it should not matter if you have tatoo's & body bling sticking off/out of you everywhere. Sadly, it does. People today make snap judgements. Dressing in a way that makes you stand out will do just that, and greatly increase your chances of a police contact. Dressing in a way that projects you are a upstanding member of society will get you and your pistol less attention. Not right, but it is what it is.
Invest in a good belt & holster if you haven't already. Practice drawing (safely) gun unloaded in private. Make sure you don't have to think about it, should the need ever arise to defend your life. Your draw should be as natural as possible and should become "muscle memory".
Seek out training when you can. Start slow and work your way up. After all, a pistol is useless if you can't put the lead where it needs to go under life & death stress. Remember: to date - I have never met a violent criminal willing to stand at exactly 21 feet, backlight themselves, and hold perfectly still for me. I am betting no one else has either. Paper targets are just that.
Consider at the bare minimum carrying a digital voice recorder. Should something go wrong, it could assist in keeping you out of jail. A mag holder with a top works good when placed on your belt to carry one. Think of it as insurance and keep it running whenever you OC.
Good luck on your OCing & post your experiences in the OC experience thread here. It helps show others who are considering OC that they won't face a swat team for doing it.