The standard advice is always to buy a transmitter and get started with the simulator. Then buy / build your custom racing drone that suits your flying style and area. Anything from 20 gram whoops that fly indoors to 5" racing quads that need a lot of open space.

But with dji neo 2 / avata you get a fairly beginner friendly set up. Once you're used to it, you can upgrade to a good racing drone by building one yourself.