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.
The ollie is a skateboarding trick where the rider and board leap into the air without the use of the rider's hands. It is basically the combination of popping, sliding, and jumping on the skateboard all at the same time. Originated in vertical skateboarding, and later on flat ground, it is not intuitively obvious how the liftoff is achieved, making the movement visually striking.
Ohderii Skate Skateboards are made of a High-quality Plastic deck which will not easily break even when pressed over by a car. It comes with 3.125″ all aluminum alloy trucks, 59mm 78A super smooth PU wheels and ABEC-7 stainless steel bearings. It is ready to use and you can easily store it in your backpack. It has an average rating of 4.5 on Amazon.