I've been thinking about this for ages, and I want my own contribution to this to be a simple webring service. If you're unfamiliar with the concept, a webring was a simple circular linked list. You had a link on your knitting-themed site to the "next knitting-themed site", that site had a link to the next one, etc. To join the ring, you just emailed someone and said "hey, I, too, have a knitting-themed site, can you…
Hotline Webring: https://hotlinewebring.club
XXIIVV Webring: https://webring.xxiivv.com
Weird Wide Webring: https://weirdwidewebring.net
I'm personally more into personal directories and blogrolls than these random clicks - but they still seem to be a good way to put together a small community. (And this post isn't meant to discourage you - but rather to encourage you to form your own.)