How should I layer my products?

anon

I just started on topicals faded for my dark spots but feel like I’m putting too much product on my skin. My skin hates too much product, but I wanna give faded a chance.

Here’s my normal routine:

Wash

Niacinamide

Azealic Acid

Retinol

Moisturiser

Where should I add the faded serum. Also is there anything I should take out that’s unnecessary?