As someone who works on vehicles a lot, not a profesional mechanic but have a couple older vehicles that I’ve been repairing and modifying including rebuilding the engine in one so far, I can say getting belts to cooperate and go where they’re suppose to is often one of the most difficult and frustrating parts of repairs. There’s most of the time very little room to get to where you need to and the belts are tight even when they have as much slack as possible. This weekend I replaced a timing belt, water pump, motor mount, and serpentine belt on my fiance’s car and ignition coil packs, and dropped a gas tank to replace a fuel pump on a coworker’s truck. When I was putting the serpentine belt on my fiance’s car I got frustrated with it and moved on to something else for a little bit and then when I had nothing else except the belt and reattaching stuff that would be in the way of the belt, I went back to fighting with it. Especially for doing your first vehicle repairs you’re likely missing tools that would make the job way easier so you’re essentially doing the job on hard mode so getting as far as you have is still a major accomplishment. Some advice though, before you get the belt on go back over all the bolts and try to make sure they’re as tight as you can get them. Without having a torque wrench to make sure they’re as tight as they’re suppose to be it’s difficult to tell if they’re fully tight especially if you’ve been fighting with it and are physically worn out at the time. I’ve had times where I tightened bolts as much as I could but was so exhausted I didn’t have the strength to get them tight enough but didn’t realize it at the time.
You wouldn’t suffer any long term effects from the blast at that distance.