Thanks, and as for your goal for today (I'm assuming that you want to do those things in succession):
-Throwing Uke into into the air can be tricky sometimes. If you're having trouble lifting him, try a different approach like splitting him in half with a punch and then throwing the rest of the torso into the air, since it weights less than his whole body it'll be easier.
-To make the boom easier aim for a cluster of joints like the middle of his torso and try to ghost (making your hand/foot get literally inside Uke's chest without the collision being detected by the engine, it can be achieved by moving your hand/foot really fast and with some experimenting of the wrist/ankle joints). Also, try to hit the torso when it's coming down, that way you'll have gravity pushing him against your hand/foot and you won't have to get that much speed yourself.