This probably isn't the advice you want to hear, but I am giving you my opinion based on my experiences:
I've dealt with low back injuries affecting nerves, and in my experience, the most important thing to do is to rehabilitate your injury and correct your mechanics before returning to intense training. Your injury may have affected your mechanics at one or many joints, and if that is the case, returning to training without addressing the issue could likely result in getting injured again. I would advise against doing a program like "I,Bodybuilder" because it's not individualized to your strengths, weaknesses, and needs.
As far as exercises go, anything with reduced or eliminated compressive spinal loading is the way to go. Sled pulls, glute ham raises, reverse hyperextensions (if you're fortunate enough to have access to one), single-leg squats, Bulgarian split squats, and a large number of other single-leg exercises would probably be beneficial.