[Routine help] wondering about getting into serums?

I have been trying to go through all of my products to have a clear out but also find a routine that works for me.

I have narrowed it down but I am still experiencing some texture/dry skin and I have redness (although I think that is sun damage that has never gone away).

Should I try a serum for dry skin? Any recommendations?

I have sensitive skin so I am a little worried about going in blind and picking a product that’s too harsh.