Good luck.
I think you can get close and I've tried, but I've given up.
I reached the conclusion that if I want an old school experience, I'll run Old School Essentials or B/X or Basic Fantasy. If I want a 5E experience, I'll run 5E. All the work you are going to put into making 5E old school... all the house rules you will present... you are just better off offering to run a real old-school game.
You don't gain much by converting 5E to old-school.
You want to advertise 5E because you want the players... you want the acceptance of a current D&D, but you are bait-switching with a way stripped down version that will be unrecognizable to any potential 5E player.
Better to be straight and offer an old school game. You may get less interest, but the interest you get may be the same as what's left after the 5E players drop from your 'old-school' bait-and-switch rules.
The point is if you want to run an old-school experience just run an old-school game. Don't trick your players with a 5E but heavily house-ruled... just present an old-school game from the start. Old school games are current, viable, and very accessible.
As far as DM'ing, there really isn't much of a difference in running old-school games compared to 5E.
Encourage old-school game-play by offering an old-school game. You can use
Basic Fantasy or
Old School Essentials. Both are either free or have free SRD's. Both are way better games than 5E will ever be, if you want an old-school experience.