My thoughts...
I had a bone graft and two pins (titanium inmplants) put in a year after my OHS. No issues. I had a bone graft done this October for two more pin implants to go in next year (same back molar area as yours). No issues. Am I getting those implants? You betcha! Dental implants are a wonderful invention.
They put the sockets in after the bone graft has fully matured, and cover them over to heal. When they're fully bound into the bone, they are uncovered so the pins can be put in. After they heal, there is no pathway for infection that has any difference from any natural tooth root, other than being more regularly shaped, which makes them easier to keep clean and discourages them from harboring as many bacteria as a natural tooth could. Of course, they don't get decayed, either.
If you wind up favoring one side of your jaw, you will damage the teeth and any work on the "good" side much faster. You may also develop jaw problems from misalignment or from disaparate jaw muscle strengths on one side vs. the other. Evening the bite has a lot of beneficial repercussions.
I think you're on the right path, and you're trying to also be cautious and reasonable. However, I'd hate for you to miss out on having balanced dentition from taking one trip too many to the Well of Agonizing Reappraisal.
In looking up "dental implant infection," one word keeps popping up: rare. The sites talk about that rare issue being most possible at implant time. There was one article that spoke of later infection being possible as a result of longstanding and recurrent periodontal disease (it was from Spain). The response to such infection doesn't seem dire, and falls within the realm of what would be done for any infected tooth root or gum tissue. And of course, an infection doesn't mean endocarditis will result.
If you don't have an active phase of periodontal disease, you shouldn't be in extra risk of infection. So get your new molar and be sure to floss.