When learning it, you will, slip and fall. Feel like an idiot doing something over and over again and not getting it, feel fear bcos you don’t know what's going to happen to you once you pop the tail, jump and slide your foot and then you land. Will you land on your board, will you be on the pavement? Will you slip out, will u kick the board away, will you land primo? No one knows but you gotta try it out and find it out yourself. Whatever it is, don't give up cos it's the strength to persevere, be crazy persistent to achieve and most of all being patient in learning and progressing that let's you earn the skateboarder title for your ownself.
My problem is that my board always lands crooked when I Ollie. The worst thing is that I even tell myself to “keep your shoulders straight” while I’m doing the Ollie and I still land crooked. I think it’s just hard for people to grasp the simple fact that everything on a skateboard has to be done horizontally which is odd because people don’t walk sideways. We walk straight. Like roller blading for example…. it’s easier for me to roller blade because I’m used to walking and running obviously except with a skateboard everything is as if you were hopping over a fence sideways. Skateboarding is tough.
Each skateboard wheel is mounted on its axle via two bearings. With few exceptions, the bearings are the industrial standard "608" size, with a bore of 8 mm (or 10mm depending on the axle), an outer diameter of 22 mm, and a width of 7 mm. These are usually made of steel, though silicon nitride, a high-tech ceramic, is sometimes used. Many skateboard bearings are graded according to the ABEC scale. The scale starts with ABEC1 as the lowest, followed by 3, 5, 7, and 9. It is a common misconception that the higher ABECs are better for skateboarding, as the ABEC rating only measures tolerances, which do not necessarily apply to skateboards. Bearing performance is determined by how well maintained the bearings are. Maintenance on bearings includes periodically cleaning and lubricating them . Bearings that are kept unmaintained have their performance greatly lowered and will soon need to be replaced. Bearing cleaning kits are commonly available on the market. The ABEC rating does not determine the speed or durability of a skateboard bearing. In particular, the ABEC rating says nothing about how well a bearing handles axial (side-to-side) loads, which are severe in most skateboard applications. Many companies do not show the ABEC rating, such as Bones Bearings, which makes bearings specifically for skateboarding, often marketed as "Skate Rated". Each bearing usually contains 7 steel or ceramic bearing balls, although other configurations are used as well.
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.