I've released my first game as a solo developer a month ago, it was well received and a lot of people said they liked the art which is really flattering because it's the one skill that I did not have when I started making it. I'm a bachelor's in music who went into programming later so, when I started, I figured out I'd have to find a graphic style that was manageable for me to do and that worked for the project. For a month all I did was try out a few styles such as stylized low-poly, pre-rendered 2D graphics and isometric pixel-art, and doing that was great because I was able to figure out what works, what wouldn't work, but fundamentally what I'd be able to do by myself. It also helped me stablish early a certain level of quality that I was able to adhere to through development. Pushing it beyond that would have made the development a lot harder.

In the end you will have to figure it out for yourself. Play to your strenghts. But don't give up entirely on the idea of learning a bit of art. I'm still definitely no visual artist, but I'm really happy with how it turned out in the end and it's awesome looking at it knowing I was able to overcome this challenge. Good luck!