i wanna be a power user in Linux and i wanna advices?

I've been using Linux since the early 90's and I still consider myself to be just scratching the surface. Sure, I can roll my own kernel and tweak my config files using vi, but 'power user' is a little bit of a strange label to want for an operating system that is powerful by default.

The best thing you could do to get more familiar with the system is look at man pages, learn how to configure applications using a text editor, read documentation for anything and everything that interests you.

Browse your /bin /sbin /usr/bin /usr/sbin directories and learn what each file is capable of doing.

Sometimes it might be as simple as

> command --help

or

> man command

Good luck.

There is no way to fast track the process, just take it day by day and start reading manuals and help files.

Before Linux I was using Solaris, AIX, RISC, and a bunch of other Unix operating systems, they are all similar in a lot of ways, I never really did get to use Microsoft stuff terribly much, though when I do it seems quite cumbersome and lacking.

Start with basics and work your way up. Check sources for an Intro to Linux.