Oxy/propane is a great tool to start learning how to put tubing together. It is slightly easier to learn with oxygen/propane than oxyacetylene because if has a slightly lower flame temperature. That gives the beginner a little more time to understand and react to what is going on in the joint. For the same reason it is a bit easier to start out with a tip that has a smaller orifice (hole). Because it produces less heat volume, it takes longer bring up a joint to the proper brazing temperature and as a result gives the operator more time to adjust the flame for proper control. As your skill and understanding of what to do increases, you can use bigger tips. I can use either when making a frame without having to think about it. I use bigger tips with propane to compensate for its lower temperature.

Learning to coordinate your left and right hand while brazing with a filler rod and heating torch will be helpful if and when you decide to learn how to TIG weld. And if you want to start making frames, there are some places where brazing is better than welding so it is a foundation skill you will want to have.