Big fitness loss after crash - advice on plan?

I spent 3 days in the hospital and it was quite a while before I could ride and 1.5yrs before I could ride pain free after I got hit by a car. My advice is take it easy for a while, just ride by feel and don’t worry about power or FTP, focus on enjoying being able to still ride, go outside and just look at the scenery. Just riding along will bring your fitness up quickly without intervals and your power will come back, it might take a while, but that’s ok.