My favorite high fantasy setting is Ptolus, but it is $100+ and not a good first setting for anyone to use. (It is, however, big and heavy enough to fight off an armed intruder, in case that's a concern at your table.)
For a dip-your-toes-in setting, I'd probably find Lost Mines of Phandelver (not Phandelver and Beyond) or Dragon of Icespire Peak (same setting) and use that. (The original Starter Set or the Essentials Set, respectively.) That should keep you occupied for a decent number of levels, it's a classic village hub and if you love the Forgotten Realms, there's more stuff coming this year that you can cleanly segue into.