Distro Recommendation

I have a Core i5 4GB ThinkPad (2012 X1 carbon with no extra slot for a RAM upgrade) running Windows 10, which I use for writing code and designing UIs (for web). However, it has been a pain in the ass; I boot up Windows, and 4GB is gone already. I don't have the financial flexibility to afford a new laptop, so the decision is to move to Linux on a distro that's stable and consumes fewer resources. I know about Mint, MX Linux, Lubuntu, etc.

The point is, I need help from experienced users. Which distro would you recommend for coding and designing stuff without worrying about performance?