first of all, learn the difference between x and z facing. In short, an x facing neo goes along the x axis, and vice versa. The difference is that the x facing neo you will encounter an invisible blockage at the start, but the z you will find it harder to land. I recommend starting with z triple neos as they are easier for beginners.
You also need to know how to use the right setup. Blindly running and jumping is a terrible strategy, always utilise the setup. THe most common is probably 7 blocks of momentum. In this case you start on the middle of the back of the side block, and headhitter timing, then aim to the edge right in front of the neo and curve in. Do not strafe.
X facing triples, you start from teh corner instead, but still headhitter time.
Other setups you'll need to figure out, there are more than im willing to list, but the best thing is to start from teh back of teh setup, for consistency.
gl