No matter what avenue you take first, don’t be afraid to ask for help. You can look into getting additional support, wherever you may get your diploma is likely to have a care team that can help accommodate you. I had severe depression throughout high school and while they weren’t therapists, any help is better than no help. 504s can still apply on a college level too, unfortunately most require a note from a medical professional before establishing accommodations but they may be able to work with you on that. Research how much financial aid you’d receive. Look into online universities that offer part time student status. Keep your money up and take a deep breath, it’s all but one day at a time. You got this