Welcome to the forum!
As this is also your intro I added that to your title. Three years isn’t that long and it’s a massive field: it will come. 
That kind of gets worse as the more you know the more you realise how much more there is to know. We get used to it. 
Step 1: Get underway a daily practice tp develop your psychic and energy working skills
Step 2: Learn about spiritual hygiene, how t banish and keep you and your space clean … this work attracts interest in the astral and you need to be able to hold your own and not get distracted
Step 3: After those are down then pick up one book and work though it.
We have a bunch of tutorial collections for all these here: