Looks like you're off to a good start, but you have a lot of substrate that is not occupied by plants. If you can, add some more rooted plants. @PlentyCoup has made some good suggestions...Dwarf Sag especially. Also, adding some floating plants like Water Lettuce will help with the absorption of excess nutrients your soil will release into the water. For the fish you're considering I'd shoot for temp somewhere in the low to mid 70's. And pH of 8.2 seems high. Have you measured the pH of your tap water?