I have questions about tailors/alterations in Baton Rouge

I've never had alterations or tailoring done, ever. So, who does the OT recommend in Baton Rouge?

Also, can tailors alter shirts? I have some regular fit shirts that I want magically transformed into slim fit shirts. Can a tailor do that?

For your troubles, here's a picture of Alison Brie and Jillian Jacobs in lingerie and a dog wearing a banana costume and another dog wearing a banana split costume.