Ok, I just got a new iTouch and I'm trying to connect to WiFi so I can download my Kindle books from Amazon. I have the App downloaded to the itouch but I cannot get it to connect to the WiFi. The WiFi switch is ON, it sees networks so I touch one, type in my Amazon acct. info. and then it tells me there is no connection. What am I missing

I was at a hotel on Friday night and was trying to use their free WiFi but it kept telling me it was not connected. Do I have to "join" a network the first time I use it? Please help. I am quickly getting very frustrated trying to connect. I have read the directions in the manual and don't know what I'm missing, unless it has to do with "joining" the network. Sorry if this is a stupid question, but hubby deals with all of the computer stuff so I'm not up on how all of that kind of stuff works.