HI Mikey, this is a pic of my 6 gal planted betta tank that I recently upgraded to for you have a look at. It's low light and I have java moss (tied to driftwood), java fern, anubias, crypts and wisteria (it's a bit of a jungle mess) and they all do well under low light in my opinion. I don't add any ferts but still see pretty good albeit slow growth, my crypts have started putting out lots of runners. My betta is super active and I kind of regret not upgrading him to an even bigger tank, but I really didn't have the room. I'm sure your betta will love the ten gallon! Maybe if you wanted to a snail or two would work in that tank as a visual interest? Once plants get going they really fill up the space and you don't tend to worry about not having many fishies in there. Good luck
Whoops there are also some vals in there!