Hi Shyam,

The online SDL Trados Studio 2017 documentation, i.e. manual, can be found here:
docs.sdl.com/.../pub.xql

Pressing F1 when you're working in Studio will take you to the main SDL Documentation site, here:
http://docs.sdl.com/SDLTradosStudio

Click on the SDL Trados Studio 2017 link in the list, then you can use the Search window top right to find whatever you need to learn about.

On page 15 of the Release notes that are available from a link in the same line as your Studio 2017 download link, there is a link to the above documentation (there's also a link that downloads a zip of all its web pages including a toc page that links to the others, to view locally in your web browser, but I don't find that useful).

A new addition to the documentation, for those words and abbreviations (jargon and acronyms) that are hard to understand in the various help info available, a 'jargon buster' has just been put together, which is hopefully going to become a multilingual termbase. For now it is available as a free PDF download in English, here:
www.translationzone.com/.../118595

There are also lots of blogs written by SDL folk and by users. Google searching can pull out the very specific information they contain.

The one I use the most, written by Paul Filkin is here:
multifarious.filkin.com/

Also, you can buy user manuals written by users, for example here:
http://tradosstudiomanual.com/
is a manual written by Mats Linder
or here:
www.packtpub.com/.../sdl-trados-studio-practical-guide
is written by Andy Walker (also available on Amazon Kindle)

There is a huge amount of information out there but as you say it isn't that obvious where it is ;-)
All the best,
Ali

(Edited 01/06/2017)