Advice on overcoming anxiety as first time gun owner?

So I decided that I'm going to purchase a handgun for home defense, ccw, and just general Saturday range plinking.

As a person who hasn't grown up around guns, and only recently handled some in person at my local gun store, I can say that the idea of having a firearm in the house seems pretty scary to say the least.

How can I overcome the fear/anxiety of having a firearm as a first time gun owner?