How can I become invisible(not physically) so I can move about unnoticed.

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

Closing the chakras helps:
https://satanisgod.org/www.angelfire.com/empire/serpentis666/Closing_Chakras.html

It is necessary to maintain steady concentration, as in meditation on emptiness.

The white aura can help you go unnoticed.

asmodeus asking in a formal ritual i was always granted

You can program your aura like: "my aura is invisible to other people in a healthy, safe and protective way" or "others cannot read my internal thoughts or intentions in a healthy, safe and protective way for me".

This is best done during trance, but you can do it when awake if you say it every day (don't start this during a VoC Moon, of course).