>Even if i can never have a collab with my oshi or the other girls
Would never happen. Even Roberu has zero interaction with EN/ID, and he's the resident flirt in Holostars. A few of them would throw you pity collabs, but judging by this comment, it would become obvious you're a former simp and they'd lose all respect for you.
Your best bet would be to show up, courteously introduce yourself to EN/ID, then never talk to them again. They'll drive themselves crazy trying to figure out why you don't want their anime pussy, and the collab requests will come flooding in. And even then, you have to be selective. Pick a collab with one of the less popular girls (ideally Iofi/Anya) and avoid your oshi like the plague while she's still obsessing over you.
Then, after maybe 2-3 years, go in for the kill and have the best collab of all time with her. Be cocky and a little flirty, but not horny or toxic. She'll melt in your hands, and at that point, your destiny is in motion.
Other than that, being a Holostar would suck. Just stream as you are now; no permissions bullshit and no gay femboy avatar.