How do I make chalk paint?

Mix 1/3 cup of Plaster of Paris and 1/3 cup of cool water; stir until completely smooth. Mix that with 1 cup of latex paint and stir thoroughly. This will make enough chalk-finish paint for one coat on a six-drawer dresser. Chalk-finish paint should not be stored and reused.

Here's a tutorial:

https://www.hometalk.com/diy/paint/furniture/how-baking-soda-can-change-the-way-you-paint-in-just-5-minutes-30024176

Several ways-https://salvagedinspirations.com/best-homemade-chalk-paint-recipes/

If the piece you're painting is something you want to display in your home for years, I'd spring for the Annie Sloan chalk paint. I just refinished an old buffet, with 3 coats on the top, and 2 on the rest of it (sides, doors, drawers), and I only used about 1/4 of a quart of Annie Sloan. I've probably got enough left for a couple more pieces of furniture, plus I plan to do some fabric painting.

Watch some youtube videos about chalk painting.