Psoriasis in three year old

Hello, I am new to the forum, so please forgive me if this topic has already been discussed. My three year old has just been diagnosed with psoriasis. I'm trying to gather as much information as I can about the condition and it's all a bit overwhelming at the moment. I was wondering if there were any other parents on here with children who have psoriasis and if so what tips they would give. I'm particularly interested in things like bubble bath, shampoo, suncream, diet ect. Thank you in advance!