I think the category of knitting is called stranded colourwork, and Fair Isle is one variation of this, with two colours per row. There are others - some Latvian variations can have up to five colours in a row (I think you really need to learn that one at your grandmother's knee when your fingers are young and supple!
Intarsia I haven't tackled - somehow I have the idea that that is even harder! Mind you, I was watching a video the other day where the demonstrator was knitting backwards.
I loved these socks, I just knew I had to learn some things before I tackled them again ... maybe the knit along would be the thing for you ...
What sewing project have you picked up?
The insulated curtain out of mostly upcycled fabric for my balcony door. :)
Ah, I have wondered about that now and then. I thought it was so ingenious and I've kept a great pile of cotton jersey ex-clothes to do a similar thing with the Afghan that I've made. I guess I should get on with that 😍