I also have mild bulging disk. What does "mild" mean for me?

Hard to say. "mild" bulge would be based on how the disc looks on mri. This has nothing to do with whether or not the disc is painful. In fact, having disc bulges is normal as we age. However, a bulging disc can be painful. So, if you have back pain and a bulge they might (or might not) be related. If no pain, then no big deal. If needed, best to discuss with non-surgical spine specialist.
Not much. A "mild" bulging disc is a relatively common finding in people with or without back pain. This is often without any symptoms and is not usually of much concern.