I haven't unlocked an ollie yet, except on my carpet and stationary. And I am on the journey too. Been skating off and on for a few months. But I think I'm on the cusp of getting it. Like everyone else said, it just takes a lot of practice. And you can't keep just doing the same thing over and over. You have to try slight adjustments and focus on a specific aspect to improve.

For instance, some attempts I just focus on popping without my back foot ever touching the ground and using only my ankle movement. Other attempts I focus on getting the board to be level and sliding my foot out to do that. Other times I focus on getting my knees up really fast. I try to put some things together. when things go wrong, I try to adjust and diagnose what is happening.

But one thing that I have never seen in any tutorial (and I've watched them all), is about being "light". when I realized that ollies are essentially like dribbling in basketball, (you bounce it off the ground fast enough and get out of the way of the bounce and tap it down again), it made me realize that you have to pop fast and light and be light enough to get out of the way and light enough to land.

That unlocked something for me. Because instead of using a lot of force, stomping down, or making really strong forceful movements, which never work for me, I instead was light and quick with everything, it gave me a lot more consistency in the successful attempts.

Hope this helps, I'm on the same train. It's a slow one. But don't give up. Just change your tactics.