Cycling Fitness / Training Advice

Looking for a bit of advice from the hive mind on how best to meaningfully use my crash recovery time... I wrecked my wrist, had 6 weeks off the bike already, surgery, currently in cast with it pinned.
Next 3-4 months indoors only + turbo trainer + powermeter + Trainer Road

I'm a very average 3 w/kg 66kg. Had been enjoying long'ish weekend rides + a couple of fast early morning club hill rides + commuting. Would like to come back ready for more of the same but faster, stronger, kept the endurance.

Was looking at either one of the following:

1. Two 6 week 'Sweet Spot Base' blocks. Mid or High volume, 5-9 hours per week.
   
2. 6 week base then 6 week 'General Build'. Similar volume.
   
3. Piece together something else.
   
   

Any advice? Adjust expectations?
Thanks!