Honestly, you should not be even thinking about jumping a two year old. Especially you said you are just starting to break him. I see a lot of things wrong with your statement. How long have you been around horses?
First off, if you are just starting to break him, you have a LOT of work to do before you should be even contemplating jumping. He is going to need a lot of groundwork and its going to take some time to get him going solid enough under saddle to jump. It is just purely safety. He needs to learn how to carry himself and a rider before throwing any poles or jumps in there. Also, I highly recommend the basics of Dressage for any horse that is aimed to jump. It helps them to learn how to use their hind end properly, which makes for a much more safe jumper. Just because he can jump on his own at any age does not mean he can jump with a rider on his back. There is SO much he has to learn first about carrying himself alone under saddle.
Secondly, I do highly recommend getting a trainer to help you. Training a youngster can be very hard at times, and a professional will be able to guide you along. They take a lot of time, work, and consistency. If you want the best for him, find someone who has the time & experience to start him correctly, or find a trainer to help you with him.