I have wavy/curly/frizzy medium weight hair which I color.
I would like recommendations for
1) a deep condition treatment product (to use once a week) and
2) an anti-frizz curl enhancing styling product that won't weigh my hair down or dry it out.
Thanks.

I use olive oil, maybe every two weeks. Heat an ounce in the microwave, making sure it isn't too hot, massage into hair and then apply a hot damp towel. Shampoo away after l0 minutes. No, it won't make your hair greasy! It works wonders as a conditioner.

I agree with the above, and for friziness, hair serum, any is good!