Have a good read around on the forum, and ask as many questions as you like. With luck and a bit of willpower you should be able to avoid your BG going any higher.
Welcome to the forum, and take it easy, you have time to learn and get used to all this. If your numbers are prediabetic, they should be easy enough to return to the normal range, if you're willing to make a few dietary tweaks to do it. It's the carbs we don't handle well (almost all carbs convert to glucose once ingested), so... Fewer carbs, better glucose levels, more often than not.
Good luck, and hopefully you'll find this place useful!
Jo