It will almost certainly be found, and probably sooner than you expect. That’s my guess.

Nothing digital, you can’t know what tech will be available. Pictures and stories of your every day life with plenty of detail, plus what you think the future will be like, again with plenty of detail–everyone likes to laugh at how wrong we get this, and the occasional thing we get right. Handwritten would be best. The further back in the past, the fewer details we have of everyday life. Only the official records survive long term, and that is “written by the victors”, so to speak. One of the most interesting things we have from the past is the complaint about a copper shipment. It’s interesting because we can all relate to that.