Depends. A lot of people still using analog cameras shoot black and white and develop at home. I personally even have a darkroom where I can make prints with an enlarger. Home developing black and white film is super simple. I have to buy it online.

For C-41 fim (most color film), there are places that still develop, Walgreens, Costco etc, however I believe they just send it off to a larger lab that processes all the film. I personally found a lab that I like that I send my color film to. They process and scan my color film for a great price. You can buy cheap color film like Kodak Gold at a drug store like Walgreens, or even Walmart. I use more specialty color film like Portra and some other “professional” color films, so I also buy those online.