First of all, Bravo! You're doing your grandparents proud by continuing their legacy. With that said, @Pillip Phillip Dwyer makes a good point; if you can stick with what you know that's the easiest.
If for whatever reason that's not an option, you're still in an enviable position starting off with that much capital. Lack of funds makes it very difficult (including for yours truly) to get off the starting blocks very quickly.
But you'll want to protect those funds. I'd find and talk to a qualified intermediary as soon as possible to lay the groundwork for a 1031 before you sell. This may not be an option since it's probably not a "like kind" but a QI would know. And even if this is not a good idea they may have other ideas (self-directed IRA...). The goal is to protect your capital while you get educated.
The good news is it's not that hard to get educated enough to get started. There are a lot of resources here. Download the podcasts and listen to the ones that sound most relevant to what you want to do. Read a ton of books: The Book on Real Estate Investing, BRRRR, Landlording on Autopilot are some good ones.
Also, just remember that you don't have to hit home runs each time. Games have been won on singles. Good luck, stay in BP, and post your progress! There are a lot of good people on here who will cheer you on.
