Update README

Resolves mypyc#27

README.md

@@ -2,3 +2,21 @@
 Automated building and storage of mypyc-compiled mypy binaries
 
 ![Build wheels status](https://github.com/mypyc/mypy_mypyc-wheels/workflows/Build%20wheels/badge.svg)
+
+## Things to know
+
+Typically, you'll want to report issues on the main mypy repo (not many people
+watch this repo)
+
+If you're running into weird issues with a pull request, try updating the
+`mypy_commit` file to the latest hash from the mypy repo.
+
+If wheels aren't getting built, debug over at
+https://github.com/mypyc/mypy_mypyc-wheels/actions
+
+You can use pip to install these wheels like so:
+```
+pip install --find-links https://github.com/mypyc/mypy_mypyc-wheels/releases/tag/v0.920+dev.48181d26e7575aece8cab61eb866ac6c573dfd76 mypy
+# or possibly
+pip install --find-links https://github.com/mypyc/mypy_mypyc-wheels/releases/latest mypy
+```