Hi Ania! My friends live in a semi-mountainous area south of Mexico City by a couple of hours. They love how warm it is during our winter months. I'm not sure of the name of the area. They invited me to go with them sometime, but right now I don't have much immunity. Perhaps I will be able to go sometime in the future as my health continues to improve. Regarding the sewing machines, if you have stores available to you I'd try them out in the store. Take several types of things to practice on so you can see how they work, especially a small quilt block with batting and backing. Regarding your stitch, I've found the basics are
1. Change needle frequently.
2. Use only the best thread. My machine refuses to sew with ordinary thread but performs great with the good stuff.
I'm sure you already knew those things but thought I'd remind.
The Yucatan Peninsula is an amazing area. I've been to Cozamel once, got to do the tourist thing, riding horses. Had a great time, but I wish I had more time to explore and get to know the local people. Those I met were very friendly and helpful. I brought home some really great vanilla and Kalua. Very good memories.
Linda