Level out on the way down – Before you start to head back towards the safety of the earth, level your feet out as the board begins to fall. If you’re trying to jump a gap on your board, this will help you keep going straight and maintain your momentum. Alternatively, you can land on your nose or tail and perform a manual out of the jump, but those are pretty advanced moves. Might want to wait until those little pink training wheels are off your board first.
To get higher ollies, I would suggesting resting your back foot on the very end of the tail and the front foot in the middle of the deck to allow for more slide. Popping as hard as you can and catching your board in the groove of the nose with you ankle practically resting in the groove will level the board out in the air. after this initial movement slide you feet back to the bolts on the tail and nose to ensure a clean landing.