It’s just an Android phone after all, there aren’t many “special” settings to boost your experience. Since the 3a Lite also has just a single glyph LED, there shouldn’t be any more complex glyph settings to work with.
In my opinion the only real noteworthy setting is actually the RAM booster, I usually turn it off right away:
- Settings - Special Functions - RAM Extension - Off
If you enjoy the Nothing styled icons, keep in mind the pre-installed one is basically just a light version and only supports themed icons for a handful of apps. You need to install the full version in order to get themed icons for every app:
https://play.google.com/store/apps/details?id=com.nothing.icon
Another personal preference of mine would be adjusting a charging limit to preserve better battery health. If you charge your phone multiple times per day, set it to 70%. If you only charge it once, set it to 80% or 90%.