We’re assuming if you’re trying to learn how to do an ollie, you’re probably pretty new to skateboarding. You may already know whether you’re goofy or regular footed, but if not, try taking a quick hop onto your board with the intention of rolling forward (you might want to try on carpet first so you don’t slip backwards). If you’re left foot naturally ends up towards the front of your board, you’re regular-footed. If you ended up putting your right foot first, you’re goofy-footed.
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.