Okay you are lowkey impressive... I like, physically flinch a bit when I'm called my deadname you must be really secure in your gender
QuIck word of advice, giving out your deadname online is generally not a good idea. There are people who would use it against you. If you're fine with that possibility, awesome, you must be pretty brave, but if you're not I would suggest phrasing it as "My birthday wish was for next birthday it would be Sam, not my deadname" or something similar. Best of luck to you, man.
I'm actually pretty similar! I'm comfortable with all pronouns except for she/her (although she/her only gives me mild dysphoria, nothing I can't handle, so I usually just say I use all pronouns) but my current favorites are le/bat/ur, a set I came up with myself. They're designed specifically to fit me and my inner sense of my gender, but I'm fine with other people using them if they like them. Best wishes, friend!
I'm Pendolibrafluid, so. That's not "accepted" either, but nobody's ever given me shit for it who isn't transphobic or enbyphobic already. Try not to worry about it to much (rich coming from a person whose gender is defined by anxiety) and just use whatever feels right. Remember that labels are just words. All you really need to know is what pronouns you prefer. And even if you do find a term that fits you, you have no obligation to share it with anyone else. Gender identity can be a pretty private thing, and if you feel uncomfortable telling people your gender you can just say so. Good luck!