I had a similar experience when I was younger when I first tried boxing over 10 years ago. Just go and get started. You'll get over the nerves of first walking into a boxing gym and quickly focus on learning the sport. Those guys that you see around the gym all had to start somewhere and they'll likely know what your experiencing so unless they're a bunch of dicks they won't give you a hard time about being the new guy.

No ones going to worry about you as the 'tough fighters' will be more focused on themselves. There will be other few boxers who also have barely any experience too so you will fit in. The coaches will only go over the basics (stance, footwork, basic jab and cross e.c.t) and once you are good enough, maybe in a few months, they will get you to spar people at your level, or against someone who is slighyt better but they will be told to go easy on you otherwise it will be stopped. There are few gyms where they put you straight into sparring, but even if they do it will be controlled and only at 50% speed and power.. Anyway 'tough fighters' won't bother you. Your not going to fight them as you are part of the same gym (unless you go pro). You may spar them, but it will go at an easy level, as sparring is for technique not about killing each other.

To be honest, no one will give a **** about you. They're too focused on their workout.

Grow a pair and aim to be better than them.

Try and convince a friend to tag along with you, just to keep you company - also it would be beneficial for both of you... fitness & bonding.

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Hello, I'm 15, quite muscular and 6 feet tall and I want to start boxing and I'm quite nervous because the gym Nearest to me has tough fighters and most of them are from different countries and backgrounds and I'm quite nervous and I'm not sure if I'd fit in or not, so what should I do about it