Experienced boxers Help please

Your 18 years old.
Start dedicating yourself now and you could make one helluva career.
I'll put it this way... your punching technique is all wrong so your not gonna do any damage with those punches. It isn't a lack of physical ability, it is a lack of technique. Fix your technique and I bet you'll see a whole different expression on people's faces when you deliver combinations.

 

You can make it better by following my initial advice - Get yourself a coach.

The things your concerned about tells me your very inexperienced. The fact that your fighting unsanctioned matches tells me not to get involved. Hence, get a coach. If you care enough about the sport, you'll do it regardless of what your momma or girlfriend says.

 

By the way, how tall are you Lew?
Do you do any kind of strength training besides boxing like lifting?

 

What does your overall routine look like? How much do you run, bag work, etc.

 

Add some more roadwork. Start with a mile or two and ramp up to three gradually. You'll see gains in boxing related stamina.

 

Some good fluid combinations at times.

I've noticed your lead left hook and right hook at close range can be quite sloppy at times, You should put your weight on your front leg, twist and throw it. The twist makes your weight end up on your back leg. When you throw the short lead hook keep your arm close to your jaw, its not too wide of a punch like a normal left hook.

These things are hard to explain, so youve got to get yourself into a gym

Keep your hands up - its good practice.

As mrdagowop said - its hard to judge just based on heavy bag.

 

Keep your guard up and to the chin all the time, especially when you roll.

It also show that you're fighting a bag and not a person. You let go a combination and then takes a break, lower you hands even more and often even look a way.

Also bring your hands back to the guard after punching, now you often leave one hand out like your doing some kind of measuring. Looks like a lazy habit to me.

Maybe a fight fotage would tell more but if you want to get good at boxing you NEED a boxing gym. Boxing requieres an oponent.

But hey, I give no were near as good as advice as a boxing coach would! Keep it up and keep us updated.

 

You have a mean 'stout' looking physique for someone who doesn't lift.
Yeah, get to a gym. Give it a shot.
I think a decent coach would want to develop/train you.