Your goal is unrealistic. 10% chance to hit things that you need to hit 90%+ of the time is a major problem. Maybe when you're a little more advanced you could try this.
I practiced a lot of alatws from footstall I could do 3 without failing. High and fast htatw and hhtatw are also some moves you'll want to practice. Try to do the high and fast htatw without the touch at the end and instead catch it with your hand. Magellan will improve your touch, practice that also. Magellan to footstall can help if you're doing the first part super fast and the second part just controlled.
The set up is the easy part, it doesn't take long for the average freestyler to be able to set up a high ball from an atw motion.
I wouldn't say latw is all that important for htlatw if you can do alatw.
Don't be afraid to hit the ball into your own nuts, it will happen. Make sure you rest properly. I suggest you train strong foot to weak foot. Strong foot will always have a better set up touch but your weak foot can become just as fast as your strong foot.
At the time I could do 3 alatws(both ways), alatws were nothing for me. I didn't train for 1.5+ years and I have an injury but I tried to do as many alatws as I could without dropping the ball and I managed to do around 7-8. What I'm trying to say is your alatw hit rate should be much higher or you'll be wasting valuable training time where you could have perfected your alatw and htatw before trying to do htlatw.
