Congrats! The more you learn and the more you hone your craft the better your beer will be! Yes, you can make beer every bit as good at home as what you can buy, and maybe even better!
The great thing about home brewing is being able to adjust your recipes as you continue to brew them to suit your precise preferences. I often like what I brew better than what I buy; not because I'm the better brewer, but because the level of hops or esters or maybe spices in what I bought just didn't suit my taste.
Southern Indiana, where I live, is not a world class beer market. Choices for some of the less popular styles are scarce or non-existent at the local stores, but I can brew my own.
And, you can brew styles that may be out of season. If you like winter warmers, for instance, they may be hard to find in July at your local package or grocery store.
One other great reason to brew is the pride you feel when your friends compliment your beer.
Brew on!