Yes, I am that clueless beginner!
Been thinking about getting into MB for a little while. I don't really understand how it works tbh (although my husband does and he's tried to explain it to me a few times now
) but just a few things first if you all wouldn't mind answering...
How many sites are you signed up with? Is it the more the better or do you just stick to a couple?
Do the sites run a credit check? I'm hoping to be going for a mortgage at some point in the not too distant future so could do without a load of gambling sites flagging up 
Do you have to spend a lot of time doing it or just an hour here and there? Have you made enough from it to think it's worth it?