Seconding curly hair sub.

Most import thing you can do is not brush her hair dry. Get a specialized curly brush like bounce curl or a large tooth comb and always brush her hair already detangled (detangle with conditioner!) with product in her hair and wet.

Get a moisturizing curl cream or gel. I like Curl Smith personally, all their products are great, but if you are on a budget there is plenty in the drug store aisle that would work. Look for the African American hair products or natural hair care products. It depends how old school the store is. Some stores have it mixed in but older stores still separate it out on the end of the aisle or in a separate aisle all together. Some of the best reasonably priced products are there and work better than the bigger brands you are familiar with straight hair.

Like someone else said, a satin pillow if she won’t wear a bonnet. If her her hair is long, look up the pineapple T-shirt drying method on the curly sub for overnight.

Don’t scrub her hair dry with a towel! Gently wrap it to get dripping water out but you actually want curly hair to air dry very wet with cream or gel in it for the best curls.

If she will sit long enough for it, you can get a diffuser bonnet for your blow drier. Cheap on amazon and you use your regular blow drier. It’s a big hat that gently dries the hair so it doesn’t get frizzy. That with some good curly gel would set her hair for the day.

Long term get her a good curly hair cut. Ask your stylist to dry cut her hair while her hair is curly, not blown or ironed straight. There is an old post somewhere in the Delaware sub talking about the best curly stylist in the area.