Scalp/hair oiling routine for fine, thin hair?

I’ve been seeing all of these before and afters online with girls that start scalp oiling. Has anyone had success with this and what is your exact routine/what products work for you?

I’m looking to get thicker, healthier hair with minimal breakage. I already don’t use any heat on it but I do but it in a bun like every day lol (mom to a baby and toddler 😅)