Welcome to MR, KindTrish.
Wow, a K2 and a DX! You will be an expert in no time.
I have the Sony 505 and love it!
Jump in and ask questions. We were all new to this at one time (just like you) and we are continuing to learn. That is what is great about the MR forums... we learn from questions asked and answers given by other members.
Enjoy your new Kindles and don't forget to check out all the free ebooks right here on MR. They are beautifully formatted by MR dedicated members.