docs(*): Update readme

rlgym training/readme.md

@@ -1,9 +1,14 @@
 # Sarpy v3
 
-`python3 -m venv venv`
+Must use python version 3.9
+
+If on Ubuntu, run `sudo apt-get install python3.9-distutils` 
+
+`pip install setuptools==65.5.0 pip==21`
+
+`python3 -m venv venv` or to specify a specific version you have installed `virtualenv -p /bin/python3.9 venv` - this example uses 3.9.
 
 On Windows `./venv/Scripts/activate`
 On Mac/Linux `source venv/bin/activate`
 
 `pip3 install -r requirements.txt`
-