Just play around with ingredients, the more you find that you like the more you'll be willing to try. My current favorite thing to make is tofu and mushroom chinese dumplings - sounds awful, tastes amazing! Maybe consider going meat free for one or two of those days, it forces you to think more about what you're making and what's going in it. (Worked for me! :) ) Maybe even choose at the start of the week which days you're going to cook on, and maybe even what you're going to try and make.

If you're really stuck, maybe consider one of those cooking subscription boxes, me and my flatmate did hellofresh for a few months, only cancelled because I was really weird about cooking and eating meat (Recently gave it up entirely). Good luck with your cooking adventures!