You start learn from the scratch, you will get answers for your questions like this on your own. Refer https://community.qlik.com/docs/DOC-7364
and refer the introduction https://community.qlik.com/docs/DOC-6577 to get some confidence while learning . Attached is the reference manual, if you have any doubts start posting in this community, members are glad to help you. There are video tutorials in you tube too. Enjoy learning. ll the best
First you need to concentrate Architecture of QV(QV Desktop/Sever/Publisher),topics(Different load types,ODBC,OLEDB connections,Data from Data base ) objects in QV(List box,charts,...etc)
then u can come to Script level
Different functions used in QV script like aggr functions,Date functions...etc
After that u need to learn security(section access,optimizing qvw file...etc)
What are CAL's?
Learn QMC ,Access point
How to Add users/Restrict users
i hope u got the small idea.
if u want some other details send me u r mail id we keep in touch i will help u what ever i know(in real time scenarios)