Good start, keep at it!
You've got a good starting point here, with a lot to build on! You're going to want to watch the audio quality, I know that can be tough with just an average computer mic, but little tricks can make sound better. For one, try not to talk too closely directly into the mic. Hold it about 8 inches away and talk right ABOVE the mic. You'll still get good sound but it won't pop and crackle as much.
It's tricky to do lip syncing just on a loop, but if you want to do that it will help if you move the characters more. Make them separate symbols and just motion tween them a bit while they're talking. It will add a lot. Good luck with it, DJ!