I'm only a small bit into this hobby/obsession, but the two keyboards I'd recommend are the Moonlander or the Ultimate Hacking Keyboard. They're both split, but

I'm only a small bit into this hobby/obsession, but the two keyboards I'd recommend are the Moonlander or the Ultimate Hacking Keyboard. They're both split, but the UHK can be combined together (not so easy on the Moonlander.) They're very popular, so have a bunch of good out-of-the-box documentation and a good out-of-the-box experience if you don't want to go too far into the rabbit hole of configuring keys and stuff. I think the UHK is a bit more pleasant build-quality wise, and it's definitely easier to start with because it's not columnar, which is a whole other thing that a keyboard can be. (Some people like columnar layouts, some hate it, I'm undecided myself and use both.)