Be patient.
I've seen a lot of drama and toxicity in this forum recently but I want to remind you to be pacient, wait calmly and be respectfull to others because they are probably in the same situation as you, instead of making this place insufferable we should make an effort to build a safe comunity while we wait.
At this point it's indeniable he's playable, maybe he's not coming on 5.6, or not even on 5.7, heck, maybe he's not coming in Nod-Krai either but he WILL. Instead of making post saying it's over or hating on other characters because "they stole Capitano's place" think of it as a patch to save primogems for him, I'm probably not the only one who thinks all this hate is overwhelming and make this place feel unwelcoming.
I don't think this will change the way things are now but at least I want to bring a new perspective to enjoy the waiting game.
So with that said, my waiting routine consists of doing the daily comissions in genshin and then focusing on my hobbies and studies. What are you doing while you wait for him?