I'm pretty much a novice myself, so I can't tell you whether meditating will help you with magick and the like, if that even exists.
But I made it a habit to meditate daily and it does help with some things that can be considered spiritual as well. It tells you a lot about your current mindset, and about yourself in general. For example, take notice which kinds of thoughts tend to re-appear in your mind, and which of them are easy or harder to let go of.
Since at least some of us consider Satan to be the god of our own innermost self, studying the self is studying the divine.
If there are external entities or the higher self etc. then I suppose meditating will also make communication with such more easily as you then can better distinguish between their messages and your own thoughts, or just simply even notice their messages better at all.
It might also be that meditation helps in your daily life by making you more relaxed and detached; in that way it may protect you from outside influences and strengthen your will.
And well, I don't manage yet to achieve that regularly, but getting in a really deep trance feels pretty awesome.
Regarding the ability to understand occult topics, that's pretty hard to measure as I find that simply reading more of it makes it easier to understand and will inspire you to your own theories.