Can you get pictures you took yourself to be printed out larger, and like professional pictures?

I need professional looking pictures.
I have a high quality camera.
Is there a way to print the pictures out and have them look professional, like actual photographer photos?
(larger, more sturdy, like you’d get from a photographer)
Is there a store I can go to to do this?

If you have a high enough resolution, you absolutely can get them printed on heavy stock and poster size! Go to Sams Club, or the Walgreens website. Probably even Flickr.