I would suggest browsing the mechanical keyboard subreddit to get an idea of what you like. When you find a board you like track down the vendor and buy it or

I would suggest browsing the mechanical keyboard subreddit to get an idea of what you like. When you find a board you like track down the vendor and buy it or pre order it. Honestly it’s not that hard to put together yourself but if time is an issue I understand. If you decide not to build it yourself find a good local builder. I did this at the beginning through a local Facebook group. They often have twitch/YouTube channels which showcase their work. Most boards are USBC at the keyboard side and support removable cables. I would stick with HHKB layout if you can or a 60% layout that supports a similar layout. You could go 40% layout but for me it’s too much mental gymnastics for symbol characters. Get an extra hotswap PCB so you can easily swap out the keyswitches or if the only option is a solder PCB turn it into a hot swap board with mill maxed sockets. Try and get something with a similar typing angle to the HHKB. Get an extra backup PCB as well.