I have dwarf corydoras including pygmys in my ten gallon. As
said, they're pretty much the ultimate tankmate. Happy, sweet and fun, I would totally go for them after your tank is a month or two mature. Also, I love the look of your tank. Very nice. Is your gravel substrate sharp? Gravel can wear down cory cat's 'whiskers', which are called barbels. They use them to rummage about and find food since they have poor eyesight.
Your betta is very cute! what's her name?