Throttle control is one of the best skills you can learn if you're a new rider. It's something that will help smooth out your ride overall, and it will keep you safer on the road in just about any situation. Braking and body control are huge, but proper throttle control can turn a decent rider into a good one.
This is a skill that takes time and every bike is going to be just a little different. Once you get the basics down, though, you'll be able to figure it out on any bike quickly enough.
Learn to Smoothly Release the Clutch
Most people can figure out how to release the clutch without stalling the bike or causing the motorcycle to lurch forward, but it takes a certain level of skill and practice to perfect truly smooth takeoffs.
This is something that you'll simply learn with practice. The key, as I've noticed, is to not keep doing the same bad habits. Every time you release the clutch, try to make it as smooth as possible.
As ThoughtCo points out, you really have to just learn to feel the bike. If you're lurching forward, you're applying too much throttle, if you're slowing down between shifts, not enough throttle is being used. If your bike jerks, you're letting the clutch out too fast. To have really good throttle control, you first need to have really good clutch control and understand and feel how your clutch, gearbox, and throttle all work together to move you down the road.
Focus on Smooth Throttle Control
(It can be tempting to just twist the throttle hard when you feel like you're not going fast enough, but there's an issue with that.
A sudden application of power can throw you off balance, especially in a turn. Also, too much throttle at once can break the rear tire loose and cause you to lose control.
A better approach is to kind of blend the throttle in. You shouldn't think of things in steps. I know its easy to learn that way, but it should be fluid and one thing should blend into the other.
Sport Rider Magazine points to techniques that Reg Pridmore teaches in his book "Smooth Riding the Pridmore Way" (note: affiliate link) and at his CLASS riding schools. Pridmore, according to Sport Rider Magazine, suggests leaving your index and middle fingers on the brake lever and using your other fingers to gently apply throttle as you come out of a turn.
This is definitely an advanced technique and something you should only try once you feel confident going into and coming out of turns, but if you want to get extremely smooth at throttle application, it's worth testing on a secluded country road or empty parking lot.
Don't Be In a Hurry
You might be trying to keep up with your buddies or attempting to ride faster than you usually do. Pushing yourself is part of learning, but only push yourself in the right environment and don't get in a hurry.
When you hurry, you're bound to make a mistake. When it comes to throttle application, this means you're going to likely apply too much throttle all a once, which makes it impossible to ride smoothly. It might feel slow at first to blend the throttle in but that's truly the best way to do it.
This is true if you're starting out from a stop or coming out of a turn. Don't just twist the throttle hard, blend it with your other actions and you'll go faster than you think.
I'm no track day pro in a car or on a motorcycle but I know one thing: smooth riding or driving is fast riding or driving, and learning proper throttle application is one of the best things you can do to become a better rider and stay safe.