ok you're 33, so i don't think you'll become professional or even amateur unless you take it seriously.
I really think that youv'e got to be quiet into boxing to get into the amateur cercuit, personally i think you just want to try something new and want to lose weight. To become an amateur you need to train
hard and most importantlyyou need to stick to it, if your don't like the sport that much you should try another sport. One that won't allow you to get pummeled in the face, trust me boxing pretty hard if your'e not determined and slack off.
Good luck in the future, hope you turn amateur and whup some ass.