Fuggedaboudit - learn to grow first. Breeding is a distant dream. Have you any idea how much space, and patience it takes to do plant breeding? It's not something that you just think, oh, I know, I'll breed some marvelous new canna varieties.
You have to grow hundreds of plants from seed, select promising ones, keep the parents (always) and then do test-crosses, grow them out, keep meticulous records, etc etc etc.
Just my 2p.