Clarify README instructions for main.py and .env

Updated instructions for environment file and clarified file descriptions.

README.md

@@ -1,5 +1,9 @@
 # pycord-bot-experimental
 Experiments with Discord Bots via pycord.
 
-The main file is the main.py. 
-main2.py is just a example from the internet and is not made by me.
+The main file is the "main.py". You have to rename the "example.env" to ".env"
+
+
+"main2.py" is just a example from the internet and is not made by me.
+
+