I’m trying to get a job in IT that will (hopefully) pay more than a usual 9 to 5. I’m been daily driving Linux exclusively for about 2 1/2 years now and I’m trying to improve my skills to the point that I could be considered a so-called “power user.” My question is this: will this increase my hiring chances significantly or marginally?
There is no certain point. Power user is a rather vague description. It still includes “user” as opposed to admin or developer or guru etc.
If vague is good enough in your area, go for it. Otherwise look for a more formal qualification.
Good luck.