docs(README): explain split builds/other tweaks

README.md

@@ -1,18 +1,35 @@
 # RVMob
 
+<a href="https://translate.revolt.chat/engage/rvmorb/">
+<img src="https://translate.revolt.chat/widgets/rvmorb/-/app/svg-badge.svg" alt="Translation status" />
+</a>
+
 **RVMob** is a mobile Revolt client made in React Native. 
 
 **Please note that RVMob is currently in beta.** It is exclusive to Android and contains several bugs/incomplete features - use at your own discretion.
 
-For development updates and other news, join [RVMob's support server](https://rvlt.gg/YW312HPF).
+For development updates and other news, join [RVMob's support server][support-server].
 
 ## Installing
 
 If you want to install RVMob, simply go to [the releases tab](https://github.com/revoltchat/rvmob/releases) and download the latest version. We plan on publishing RVMob to app stores in the future.
 
 Debug builds are also produced for every commit. These are unoptimised - they're much larger and noticeably slower than the release builds, but you can try out new features early.
 
-Also note that, from v0.7.0, RVMob's APKs are **split by architecture**. This helps to reduce file sizes - however, you'll need to make sure that you **download the APK that matches your device's architecture**, or **it won't install!**
+### Info about split builds
+
+Also note that, from v0.7.0, RVMob's APKs are **split by architecture**. This helps to reduce file and app sizes - however, you'll need to make sure that you **download the APK that matches your device's architecture**, or **it won't install!** 
+
+If you're using an app store, this should be handled for you. If not, however, you'll need to check your device's architecture. I'd recommend using [Treble Info](https://gitlab.com/TrebleInfo/TrebleInfo/-/blob/dev/README.md) for this. Install and open the app - **don't worry about what it says on the home page!** - then open the Details tab and check the CPU architecture entry.
+
+Depending on what it says:
+- if it says `ARM64`, you'll want the APK with **`arm64-v8a`** in its file name;
+- if it says `ARM32`, you'll want the APK with **`armeabi-v7a`** in its file name;
+- if it says `x86_64`, you'll want the APK with **`x86_64`** in its file name;
+- and if it says `x86`, you'll want the APK with **`x86` but without `64`** in its file name.
+
+If it says `Unknown`, please ask for help in [our support server][support-server]
+
 
 ## Building
 
@@ -30,6 +47,7 @@ yarn install
 npx rn-nodeify -e
 npx react-native-asset
 yarn android # for the android app
+yarn start
 ```
 
 CLI commands:
@@ -52,4 +70,6 @@ If you're still experiencing issues, and there aren't any open issues for the bu
 
 ## License
 
-RVMob is licensed under the [GNU Affero General Public License v3.0](https://github.com/revoltchat/rvmob/blob/master/LICENSE).
+RVMob is licensed under the [GNU Affero General Public License v3.0](https://github.com/revoltchat/rvmob/blob/master/LICENSE).
+
+[support-server]: https://rvlt.gg/rvmob