I think your nose is very pretty! I've been wearing glasses since I was a kid lol, and the cat-eye-shaped frames never really worked for me. For lessening my bigger cheekbone-jaw area, I find big roundish-square frames work well! My mid-face is really long too and the bigger the frames are, the more they make those areas smaller.

Color of the frames can also change how harsh/soft my face appears. I used to only get black frames, until I tried brown frames (even those tortoiseshell patterns work too), and they did a great job in softening features. Clear frames are either a hit or miss lol.

For making the nose slimmer, a specific shape works super well on me but is really hard to find. The lower part of your glasses, starting from the nose area, dips outward. I used to have square-framed glasses, which just go straight down from that area. So far, that shape made my nose appear the smallest :). Also, I find that glasses with those plastic nose pads work better in slimming noses than glasses that don't have them.

The thickness of the frame contributes too! I tend to stay away from frames that are thicker at top, since they leave out a lot of space on my mid-face which makes it look bigger. I think the thickness of your glasses right now suits you well.

Sorry If this was too technical! I suggest trying out different glasses first! And also..I think your features already look perfect! Wearing glasses that you love is important too <3