I highly recommend Xah Lee's site (recommended on a previous HN keyboard thread). [0]

I personally have the X-Bows, and like it quite a bit as a starter ergo keyboard. [1][2]

I've also backed the Glove80 on Kickstarter (after learning about it on HN!) as a deeper dive into ergo. [3][4]

[0] http://xahlee.info/kbd/keyboarding.html

[1] http://xahlee.info/kbd/xbows_keyboard_review.html

[2] https://x-bows.com/collections/keyboards

[3] http://xahlee.info/kbd/glove80_keyboard.html

[4] https://www.kickstarter.com/projects/moergo/glove80-the-incr...