Only place I've read that low porosity hair doesn't like protein is on My fine/low porosity hair never met a protein it didn't like. So, you may not want to steer clear of protein unless your hair is coarse.

Can't help you with products. I use things that I buy online. Just read some of the threads about drugstore products. Find people with similar properties and see what products they use that you might be able to buy.
3a (Corkicelli), highlighted, fine, low porosity

HGs: Anything Sevi; Curly Kinks Satin Roots, Curlycue ReNew and Coil Jam; homemade FSG and okra gel; soap bars; UFD Curly Magic; Botanical Spirits Jellies, CJ Repair Me, Aloe Fix