fill out readme, fix wrong name

README.md

@@ -1,5 +1,9 @@
 # rct-guest
 
-rct-guest looks too intense for me!
+> rct-guest looks too intense for me!
+
+rct-guest is a Fediverse bot that posts a random string in the style of thoughts from Roller Coaster Tycoon. All of the thoughts that appear in the first and second games appear. Thoughts such as "I'm not going on _____ while it's raining!" will be filled in with a ride name and a number, such as Swinging Ship 2.
+
+Before using this bot, you'll need to create an account on an instance (I recommend [botsin.space](https://botsin.space)) and run `login.py` to log in.
 
 The information in `data.json` was obtained from [the RCT wiki](https://rct.fandom.com/wiki/RollerCoaster_Tycoon_Wiki). `data.json` is available under a [CC-BY-SA](https://creativecommons.org/licenses/by-sa/4.0/) license. The information was compiled from multiple pages and reorganised into the JSON format.

post.py

@@ -19,7 +19,7 @@ import json, random
 try:
 	cfg = json.load(open('config.json', 'r'))
 except:
-	print("Couldn't load config.json. Make sure you run main.py first!\n-----")
+	print("Couldn't load config.json. Make sure you run login.py first!\n-----")
 	raise
 meta = json.load(open('meta.json', 'r'))