> Do an interview with your players, find out how far they can run, how much they can lift, their stamina, their intelligence, etc.
Assign a balanced score for the six stats to them.
Make a level 0 character based off of their stats, and have the first session with their characters (i.e. them) go from our world to a world of your choice. You can do this by having something convince them or, like me, have them make WIS saving throws and have the world collapse around them to force them to go through a portal. Give them some time to get some things, and then start them off as weak as they are…