So in 2015 I've bought an old (as in 70 years old) Singer 201-1 which only* sew straight stitch, but it does so beautifully, is easy to learn, to maintain and should probably outlast me, but by the time it has arrived I've been off to a long hike, and when I returned I told myself I was too busy to find the time (and "courage") to get started learning to use a sewing machine.
Then in 2020, an awful need to procrastinate over work lead me to finally learn how to thread it, the to take it apart for cleaning/oiling and finally I managed to half ass a face mask (and few other items including garments I ended up using on long-ish distance trails).
I then went back to BPL's MYOG⁽¹⁾ forum and r/myog ⁽²⁾, both super useful resources that have been helping gear makers for many years. I think it was on r/myog that I learned of Tim's learnmyong.com, which has since then grew into one of the best resources for (hiking gear related) patterns and educational videos (some patters are free, others can be purchased, all the ones that I've tried are of excellent quality IMO). I've also had good results with Green Pepper patterns.
* Zig zag as well as button-hole attachments do exist though (and they work surprisingly well)
⁽¹⁾ https://backpackinglight.com/forums/forum/gear/make-your-own...