You should have experience with invoking elements, or at least do preliminary meditations to prepare yourself for invoking it. But I personally haven’t found preparation meditation on JoS for invoking Akasha. So I just put it here, rest info you will find on this link.
You also should be familiar with foundation meditation, if you are not, make yourself experienced in this at first, but to do it you have to be dedicated, otherwise it dangerous.
Invoking Akasha helped me in the past, it works wonders in being “invisible” totally effortlessly and naturally, I know it is individual for everyone but to a certain level it would definitely make you benefit, here it is: https://joyofsatan.org/www.angelfire.com/empire/serpentis666/Invoking_Quintessence.html