As a beginner with less knowledge, joining a club will give you more benefit and partner to share. Join the local motocross club in your area. It has many information about practicing, spare part, having race licence or even getting some tips to stay healthy for the race. They will be able to tell you when practice ride days are other technical details that you need to look into before you race.

 

When you're practicing riding, build up the confidence can be done gradually. Sometimes it needs more time to spend in mastering the very basics of riding and then work your way up to riding at speed and tackling some of the more difficult obstacles on the track.

In order to give you more lesson, watching experienced riders and taking notice of how they ride sections can be valuable. But it can make you confuse and have trouble at first. The most important thing is to take your time because you need to push yourself a little to improve but if you are feeling uncomfortable with the way you're riding and you have a decent crash it may take quite a while before you get your confidence back.  Absorb as much information about riding techniques as you can and then apply them yourself when you're out practising. In no time you'll find yourself improving and growing more confident and comfortable. As fun as motocross is, it still can be a dangerous sport so be careful.