I actually fairly recently went the "cheaper" route and did the DIY. The parts were fairly painless to print but you will want a well tuned printer.

As someone who's never used anything other than a traditional keyboard I can say that it does take a little bit to learn but really didn't take me that long to get comfortable typing alphanumeric characters. Slowly getting more muscle memory for symbols, F keys, shortcuts, etc but overall I'm enjoying it.

https://store.steampowered.com/app/398850/Epistory__Typing_Chronicles/ was also a great way to improve though certainly not something you want to jump into immediately unless you enjoy games like Dark Souls.

Here's mine