Check out erowid.org, or the psychedelics explorers guide. https://www.amazon.com/dp/1594774021/ref=cm_sw_r_cp_apa_glt_fabc_BNSNKZR0GPWMEEH5HF7G
Set and setting are very important. You get out of it what you put into it. For me, it is a very spiritual/psychological experience.
Learn to meditate. Being able to accept what comes and remain calm and centered is valuable.
Set some ground rules for yourself before you start. Turn off your phone, lock the doors, eliminate other distractions. Get a few playlists together that offer some different vibes so you can roll with where it goes. I usually have a nature/Zen meditation list, a psychedelic list (shpongle, desert dwellers), classical .
Have some paper, pens or colors to write down your thoughts, and get creative with.
My advice? Dont worry about oculus. Like someone else said, its pretty sobering/not that cool. The amazing things will be in your head.
Trust the drug. Be open. Let go.
DM me if you want to discuss more.
Just as a counter piece of advice: I definitely wouldn't recommend going and learning how to use something like GameMaker.
I agree that learning Scratch or something else simple is a good idea to get basic programming techniques happening (I started with Processing and PureData. But spending time learning the interface and 'ways' of doing things in anything other than Unity to start with is just a waste of time and potentially confusing - Unity isn't that complex so long as you start out making something simple.
Not sure about VR but in 2d space ProjectM is a very capable Milkdrop clone for Android.
I connect my Samsung phone to my 4k TV and run it on DeX. Will use external or internal audio.