Return to the Keep on the Borderlands
Roll 4d6 7 times discarding the lowest die each time. At the end discard your lowest stat and assign as desirable. If Str=18 roll percentile for fighters etc.
You can begin as no class/zero level if you like and choose as desired after a few “days” (in that case I will allow re-assignment of the stats).
No background is required upfront as we will deploy it through role-playing.