I would start off small and cheap. There Is a learning curve to the machine and the cam/cad software, my take is why screw up nice bits.
Always use solid carbide. You can get a cheap 1/4" up cut spiral at home depot for around 20 dollars. Why spend money on expensive cutters while learning? I did and it hurts to hear a $40 bit snap off .
You'll need a ball end cutter or two, a v groove bit or two maybe 60 deg.& 90 deg.
Amana has a pretty good catalog they will send you. We don't buy our day to day compression cutters from them , but have bought some of their miter fold bits and larger insert tooling heads.
One thing to get familiar with is a chip load calculator it is not perfect but a good start for feed rates, rpm and material types.
Good luck but buy cheap until you have a good feel for how things work.