2 weeks? Ups, I started too soon then.
About the circulars advice, i did know that and I use circulars whenever I can because I like them better (I don't stick them in my friends eyes and such), but where I live circulars are too expensive, so I have more straight needles.. And use them more often..
About the way I knit, it's kind of continental, but I knit with the yarn around my neck, are you familiar with this way? I only saw people knitting with the yarn around their fingers twice, and only after discovering internet I found out that you knit this way in the USA

I'm going to try a better posture for sure and that advice for the pillow sounds great (and I have my eyes on that glove too, too bad they don't ship internationally).
Thank you all!