Welcome to BYC! So glad you could join! Its awesome that you are doing research, that's always the best step towards keeping a good flock of chickens.
Chickens are so much fun, I love them! I have 50, but starting small is certainly a wise thing to do (we're trying to lower the number some). Bantams are a lot of fun and come in so many shapes and colors. Some make better layers, others better pets, others better foragers. If you want pets then cochins or silkies tend to be the best. Sebrights and OEGBs can be really friendly with extra handling and are also beautiful! You can also get miniature versions of the standard breeds, such as Leghorns, Barred Rocks, Rhode Island Reds and Easter Eggers.
It can be hard to get pullet-versions of bantams, though not impossible. However, if you get day-old chicks you will likely get more roosters then you want and it may be hard to find them a home. However, day-old chicks are easier to tame (and so cute too!) It is personal choice.
Bantam roosters can be so friendly and cute. However, some breeds like sebrights and OEGBs tend to have noisy, active, and often aggressive roosters that aren't best for a smaller property or smaller flock. The more active breeds need about 8-12 hens, while the calmer breeds (cochins, silkies, mini wyandottes, ect) require fewer hens to keep them happy.
Feel free to ask any other questions you may have! Best of luck with your future flock!