Both your height and weight should play an important role when you are choosing a skateboard. You need to find a skateboard, which fits your weight and height. Picking one, which is either too small or too big might only cause you to experience difficulty controlling it, especially if you are still a beginner learning the ins and outs of skateboarding.
It's a neat piece of science art, and it also tells us something interesting. The arrows show us that the force on the skateboard is constantly changing, both in magnitude as well as in direction. Now the force of gravity obviously isn't changing, so the reason that these force arrows are shrinking and growing and tumbling around is that the skater is changing how their feet pushes and pulls against the board. By applying a variable force that changes both in strength and direction, they're steering the board.
The grip tape found on a skateboard can actually be defined as the grainy sheet, which resembles sandpaper that also comes with a sticky underside. Such underside needs to adhere to the deck’s surfaces as a means of increasing traction or grip. No matter what skating style you use, the grip tape is extremely helpful in your attempt to stay on the board.
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.