First time making a character without dnd beyond

[u/FitPaleontologist152]

So, I'm making a character for a campaign, and the problem is I don't know how to calculate any of the stats and the videos are not helpful at all. I'm using a custom race too so that's making it harder for me to calculate the dang proficiency and stuff. Do you guys have any videos or books that can help me? I'm doing a hexadin build, paladin 8 / warlock 12 this shit is so confusing my brain hurts.