Good for you, if this is really what you want. You sound a little unsure about the whole thing. But regardless, it's a good job with the potential to make very good money. Maybe you will love it and move up and up the Google line. But whatever you do or where ever you work I hope you are happy. Your work is a part of your life a big part. If you are not happy there, as you very well know, it kinda puts a damper on the rest of your life. Tends to bring ya down.
You are young enough and smart enough that I honestly believe you can do pretty much what ever you choose or set your mind and heart on. Personally I think you should give it some serious thought. People practically kill themselves working and living from pay check to pay check each week and by the end of the week they are literally broke. Why not do something you love and make enough money to enjoy life if you can. Only my opinion.
Sorry didn't mean to sound like your mom.... But ....
BTW I think you will make a great salesman as I think you are great at everything.