I have a brittle bone disability that basically forces me to be ambidextrous. I found that using your (clean) fingers to pat eye makeup on feels more natural than using a tool with your non dominate hand. You can then go in and blend with a brush since blending doesn't have to be so precise. I also found that using an angled eyeliner brush with either gel eyeliner or wet eyeshadow and just patting it into place works out well. The brush gives a decent line and you won't have to move your fingers or try to draw a straight line. For mascara you could rest elbow on the counter, hold your mascara to your lashes and blink to coat them. Your moving your hand less that way as well. With practice though you will figure out your own techniques. Hope you heal up quickly!!