Hi, KermodeMamma. Knitting tight is a problem for many. You're not alone! I found that how I hold the yarn, not too tightly so that it flows through my fingers, helped a lot. Making sure I get the new stitch on the fatter part of the needle helps too. The angle at which I hold the needles in relation to each other makes a difference. I suggest some soothing music, a who cares I'm just doing this because I want to attitude and just sit for a while and see what difference trying some different things makes. Usually it seems that a death grip on the working yarn and pulling the yarn tight after making a new stitch are the main culprits. We'd love to see you succeed! One last thing: Don't start with a real project, just cast on and see if you can do some rows that you're more satisfied with.
I should never overestimate my basic arithmetic skills.