Navigate your phone settings and first go to about phone. From there go to software information. You should see your build number. Tap the build number several times in a row and developer options will be unlocked. This gives you access to developer options and a whole new set of customization features
Ahh yes… That path leads to dangerous things for the ignorant. I destroyed a Redmi note like this after deleting the NVRAM and losing the IMEI (not that the number is lost, but “re-writing” it is impossible.