Reverse engineering of file/archive formats requires skills and experience.
You can find some generic information and tutorials in the Tutorials section:viewforum.php?f=4
If you have never used a hex editor, never programmed, never used the command-line, don't know what are bits, byte, strings, endianess, zlib and so on... you are very very very far from anything.
QuickBMS and any programming language are totally USELESS if you are unable to retrieve information about the structure of a format.
Reverse engineering is 90% of the work, programming/quickbms is the rest.
The good news is that there are so many quickbms scripts and sample files available that for sure there is lot of stuff for practice.
Tip for quickbms: the -V option is the most important feature for both reversing and scripting, together with the hex editor it makes the two works (RE/programming) just one unique thing.