Hi Elizabeth, We used the wire racks that the sell for closet organizing. This way I can store things on them, use them as drying racks, laying out clothes on the top if needed and hang clothes underneath. You can peek at them here if you like. https://www.exquisitelyunremarkable.com/2016/02/practical-laundry-room-ideas.html
Any home improvement center has a multitude of brackets to choose from as well as pre-cut shelving in different sizes. You can paint or stain the wood to coordinate with you decor.
There are many great ways to do this!
I would first determine how wide you want them and then if you want more than 1 or 2 high. And what weight do you want them to hold? That will help you determine what brackets you need. I have a post that might help you with finding studd and getting them level. https://www.girljustdiy.com/how-to-install-shelves/