Everyone is in the same predicament as you. If you have a 1911, I'd get a .22LR conversion for it - Your first 2000 rounds should pay for it.
Find the Walmart in your area that stocks ammo, and become "friends" with the person in sporting goods. They will often notify you when ammo is coming in.
Ammoman.com, surplusammo.com are two places you may look. When they have it, their prices aren't too bad. You may think about getting into reloading but primers are an issue right now too. BVAC ammo has 100 million primers on back order and is receiving a million every day.Oh and they're still backordering 100,000 rounds daily and they pumping out a few hundred thousand daily. Powder Valley has 50 million primers on back order. Ammo is going to be hard to come by and probably expensive for a while.
You will need to think of way to maximize your training for the least amount of rounds downrange.
DRY PRACTICE - DRY PRACTICE. A particular Army unit shooting school has the students do two weeks of dry practice before the first round goes downrange. Get a shot timer and practice your draw, mag changes, etc on the PAR setting. You can do that in your living room.
Probably not the answer you were looking for but it is what it is...