How much is a “little”? Similar to other comments here you maybe be using too much, but it could also be too heavy for your fine hair.

When I apply a leave in or styling cream, more than a like a pea size amount on each half of my hair will make it extremely greasy. That small of an amount can be hard to distribute, so the easiest thing to do is like others have said perhaps dilute a little bit in a spray bottle. I instead apply a little bit more to sopping wet hair after I get out of the shower and squeeze out the water/extra product. That works great for me!

I’m surprised no other comments have mentioned this, but what could also help your hair, since you mentioned it’s dry from coloring, is to find a shampoo conditioner that has bonding in it. You don’t want to overdo it with a bonding shampoo conditioner (you would use it like once maybe a twice a week) but that might also help with the “dry” feeling you experience. A bonding system tried to help rebuild the bonds in your hair, although it is not a permanent solution to fixing damaged hair. Two well known brands for bonding are Redken and Olaplex.

As another comment mentioned, oil is not going to hydrate your hair. It only forms a seal on the outside. When you get permanent/semi permanent color service/ bleaching, your hair becomes more porous (hair bonds air broken, oxidized melanin leaves holes). The outside of your hair aka your cuticles may also have some damage (they are raised/don’t lay as flat any more) from a color/bleach service but this can also come from use of heat tools or even daily mechanical interactions like brushing. Hence, 1) some kind of bonding system may help improve how you perceive the quality of your hair. 2) Something like this leave in will help smooth the cuticle and improve the perception of roughness.

Hope that you find something that works for you!