Welcome to Hostas. It sounds as though you have very good conditions for growing good hostas. As to what hostas to choose, that's where it gets tricky. For new hosta gardeners, I would suggest some of the beautiful tried and true varieties. Some hosta nurseries will have lists of hostas to start with. You could also look at the "Hosta of the Year" lists. Most of them are good varieties.
I do recommend avoiding box stores because there are some hosta viruses out there and hostas from such places have a much higher incidence of disease than a good nursery will have. (Google Hosta Virus X and learn its symptoms).
Bear in mind that hostas will change a lot as they mature and one that you buy in a nursery as a one or two eye plant might look a lot different in a few years. They will take 3-5 years to attain full growth; so leave space and don't expect them to look mature the first year.
Don Rawson has some wonderful lists of hostas by a whole host of characteristics. Just take some of the characteristics with a grain of salt because a hosta that grows well for me might not for you. If a hosta doesn't seem to grow well, try moving it. Praying Hands, for instance does well in near-full sun and mine grew much better when I moved it.
http://www.hostalists.org/
If you wish to look at my experiences, I've been tracking my hostas annually since 2008. Mine are mostly small-medium in size, but bear in mind that I'm in zone 5. The following link will take you to my hostas that start with 'A'.
https://violaann.smugmug.com/G... If you'd like to look at other hostas that I've grown, in the top left of the page there's a picture of a house > Garden > Hostas. Click on 'Hostas' and you'll be taken to the page that shows all my hosta galleries.
Keep in touch and show us pictures of what you grow. Good luck.
