I have a split ortholinear keyboard that I made with parts from Keebio, I fucking love it. It has really reduced wrist strain for me.
It’s the Levinson Rev. 3, which is relatively cheap (this is an expensive hobby just FYI) if you want to get into keyboards.
Edit: Levinson Rev. 3 was discontinued but the BFO-9000 is still a good option for a no-frills dip into things.
The best way to “try before you buy” is to go to keyboard meetups in your area if they’re available. Unfortunately, that does leave a lot of folks out, but if you live in a city that will probably be your best bet.