The genie arrives and gives you the option to go back in time to the morning you start freshmen year of high school.
Mentally, you will be back in your childhood brain, with the caveat of being allowed to retain two pieces of information, everything else about your current life is wiped and you start over. That means once chosen, you won’t remember any family you had as it’s never happened(unless you choose that information as one of your things to retain). The information can be relatively broad but can’t be “learned information” in the sense of, knowing how to code,build a fusion reactor, etc. just a piece of information you could pass on to someone in passing- bitcoin goes to $xx in 20xx, you’re future wife will be at x location during x time, Seahawks win the 26 SB(go hawks), you get the idea. No monkeys paw or “side effects” aside from typical butterfly effect of any knowledge you choose to go back with. For the scenario younger you will 100% believe and act on the information you choose to retain, though they won’t remember anything about the previous life, they know these two things to be fact. Do you take the deal?