[Saxguy]

I have so many questions (I'm not too great with computers or apps I’m afraid!) and I would be so grateful of some help. Okay, so the story so far is, I have a fire HDX with CC (full version 3.6.3 I believe). I am running calibre on my home PC, and somehow I have managed to set up the wireless server, and I have got my Fire (CC) to connect to it. I was so proud of myself at this point! LOL.
When I connect to “content server” I can download books with CC, and even read them. However, always a message comes up saying that “if you open the kindle reader from here, your reading position will be returned to the start” or something like that. This is bothersome for obvious reasons.
So, I have tried and tried to find how to open the book differently, but I can only manage to open it with the CC app. There must be a way for me to move the book to my Fire, and read it using kindles reader surely? Else do I need another app?
I did look through the forum last night, for ages, and I couldn’t find any solutions. There is so many references to other apps and stuff, programing etc, all which is far above my paygrade I'm afraid.
As for CC, I must have bought it at some time, as reading here, it seems there is a free version, where the app icon has a stamp saying the same, whereas mine doesn’t have. I haven’t used the Fire as much as I would have liked, as I found it a little intimidating, but following my success with the “sharing” setup, I intend to learn more and get full use. Oh, also, to say that I haven’t used it much, I am surprised that the CC is showing a current version. Does this app update automatically somehow? I cant see how to “update” it manually.
Okay, enough for now. If I can at least get the first issue sorted I will be happy for a while.
Thank you