I came to this thread to say the military bases I was stationed on in the 90s had Hobby Shops where you could get free help from other [probably uncertified DIYers] mechanics and it was the way you did car maintenance if you were enlisted. (Turns out ~$800 a month didn't go very far, even in the 90s!)

But weird coincidence, a few minutes ago I purchased some Park Tools bicycle repair tools to perform some maintenance on my mountain bike after watching a couple of their videos.