A group of kids from USA of 50s find a crashed truck with 2020s-30s computers and electronic toys (anything - drones, power tools, 3d printers with supplies, advanced rifle scopes - FLIR and their kind, whatever else. It is a big truck, 18-wheeler, loaded to the top). Also, computers are not just 'blank from shop shelf', but from different people, and mostly have their hard drives full of something. To make the plot move, the first one they find belonged to author writing about ISOTs and do-overs exactly about late 20th-early 21st century. With tons of actual info, so, while not exactly Google, since they have to find information in more traditional way, looking from file to file, with small help of computer search engine, there is probably just as much info as they might need.
I know that right now, movies, music, and many other things have long gone to online services, and property rights is a serious thing. But there are places in this world, where online piracy is alive and well and some people store whatever they have on hard drives. Lets assume that was what an anomalous congregation of torrents and ftp fans' computers.
These kids manage to get the truck running enough to get it off the road and hide (it could be a rural area, and they had an empty barn at hand), and keep the knowledge from families and authorities.
Now they have tools and information from the future, and it is up to them how to use it. Plus, it is a group knowledge, and there is a high chance of secret spreading around, and more people getting involved. They do their best to keep it under control, and with some luck (also known as Author's Will) they manage, only getting right people into their circle.
What complications they have? About a million, I think. They are schoolkids and have to go to school. They have families and have to do their chores and can't just disappear for hours. They have to keep it secret. They have to find ways to get electricity running - buy fuel for generator, for example, or handle solar panels they found in the truck, since they can't automate everything or leave it out in the open for strangers. They have to learn themselves how to run computers and to use them, and all other electronic toys. They are limited with time and 'information output' - how much they can get out in given time. They have problems with not knowing what to look for and have to get through millions of gigabytes of everything (including very alluring stuff like movies and videogames).
The truck driver dies in a crash at the moment of ISOT (didn't buckle his belt and went flying through the windshield, breaking his neck?), and he has some cyber-implants too. The truck is some near-future full-electric thing, with autopilot and other fun options (can use its huge battery to run computers, and charge it from solar panels of fuel generator).