Where are you located, and what velodrome is this? Many tracks have associated clubs, events, training, and races.
The Bareknuckle is a great frame. Use it until you know you’ve outgrown it. It may take a while.
Training is a huuuuge topic - definitely too much for one thread. Training starts with, where are you and where do you want to go? So it’s very individual. However, there are a couple things you can do, all by yourself, to have fun and try to improve and measure your progress. You can do some basic solo timed events (500m / 1000m from a standing start; flying 200m - those are classic sprint events. And, the 3km / 4km individual pursuit is a classic endurance event). There’s a common endurance training pattern that’s just doing 2laps hard and 2 laps easy, over and over. Or, you can do a “points race simulation” where you ride briskly and sprint every 2.5km.
Have fun
