[annapurna]

1) You're on the right track for making the decision about surgical options. You should also consider how fast you're getting worse. At some point the problems of conservative care will outweigh the risks of surgery in your estimation. That's when surgery is reasonable. Unfortunately, no one can tell you when that point is as it's mostly based on how you perceive risk.
2) ADR can be done after microdisectomy.

I would suggest that you start actively looking at stem cell or prolotherapy type conservative care options right now as they really only work as early stage interventions. Once the disk start showing advanced DDD, they really can't reverse things. You don't have to use them, but you should be researching them now so you know what's out there and what they could offer you.