Help What bike to get as a beginner

Hello I am 22, 210, 6 ft looking to get into riding. I race sprint cars and have raced my whole life. I just recently moved and next to my house is a riding park. I have rode little pit bikes before and have balance in other forms. Just curious what bike would be a good bike to start on. The riding park has lots of tracks and obviously I won’t be at the pro track etc. but I have a plot of land with lots of trails at my parents that are rideable. If you could point me In the right direction that would be a good way to go it would be much appreciated. I don’t want to get something that will be overboard for what I need and don’t want to hurt myself or jeopardize someone else. Thank you.