To 'meditate' in the occult sense have different meanings. There's the training of your mind through different types of meditations, there's the more purposeful meditations to influence reality, your subconscious, your physical and energetic bodies, and whatnot, and then there's meditating to attain gnosis (experiential knowledge), which I think might be what you mean.
To me, meditating on occult concepts for gnosis is somewhat like just straight up thinking about it intellectually, the way you do with anything, but the difference is that you're ultimately trying to "find" and feel out the idea's true essence and hidden assumptions in a way that is personal and makes sense to you, which usually amounts to a complex truth that can only be understood experientially and one you can't really distill into or explain as it is whole using words since words are inadequate for the job. Even if you try, normies (i.e. the unawakened, uninitiated) will distort and misunderstand these truths because they have different mindsets/backgrounds/beleifs, and this is why the word 'occult' etymologically meant "to conceal," and what is "hidden" - most of the time, in plain sight. That's also why you get idiots who read esoteric texts and stories (e.g. bible, myths) and take everything literally because they can't access the occult meanings, or "essence" of these texts. At some point, you need to withdraw from books and what is the external and turn inwards, to 'meditate' in order to find the truth.
As for the process of meditating on topics for gnosis, my two-cents bc this is getting rlly fkin long: