Holy crap man you remind me of myself! A LOT! Except I never used my weak foot so it's really good that you're using it already.
I've been where you are now and I can tell you that you should try combos like atw-co-htw-atw and atw-co-atw-co-atw. Those combos help a lot cuz your touch on atw and htw will get a lot better. My first combo was with tatw was tatw-htw, and it's all about practice, there's no secret to doing combos with tatw, so just keep at it :D