Absolutely go for it. You are young and approaching your prime in several years so now is the time. Take advantage of your youth!
Give 100% in every training session, listen to advice and prepare for every fight like it is your last. Remember there is no failure if you give it a go and even get sparked out in your first fight. The failure would be not trying. Best of luck on your journey.
Just remember you don’t have to go to prison for murder like Lyle did pursue a boxing career, haha. Good luck. Give it your all. Focus on the process (learning every day, getting in better shape than you’ve ever been in your life, eating proper) and not on the outcome. Stay where your feet are — don’t be day-dreaming about being a pro one day while someone is trying to teach you how to jab or improve your footwork … concentrate on the lessons. One more thing: I always liked Roy Jones Jr’s advice to prepare for setbacks. Injury, a cut, a fight (pro or amateur) getting canceled or postponed … that’s all part of it. Don’t allow it to puncture your balloon … make use of the extra time. As RJJ put it, ‘God puts obstacles in our way to make sure we really want what we say we want.’ Whether you believe in god or not is immaterial … you can substitute the word ‘life’ or ‘fate’ or whatever in place of god, but the point is still the same — you will have setbacks and how you respond to them will determine your level of success to a great degree.
Walk in to that gym and proclaim that you want to be a fighter. Then listen to what they say, do what they tell you to do and then get registered and get some bouts. You'll never experience anything like it, fighting other trained fighters. With the fighting in the pros you'll want to be very careful with that. The pros and ams are like night and day. In the ams the refs first concern is keeping the fighters safe, in the pros your main concern is keeping it clean. Safety is still a major concern but not like in the ams. Get in there and just do it. You might surprise yourself. Good luck and never show up for a bout out of shape. As a trainer told me, "Fatigue makes cowards of us all."