Bioderma works
Minimalist sepicalm is another good cheap option
Vitamin C is ascorbic acid not citric
Citric acid, Sorbic acid etc is an antibacterial agent to prevent the moisturer from going bad
I would suggest against further diluting 0.025% tretinoin, if irritation is concern use microsphere formulation, or adapalene
Squalene based moisturiser is good for packing in retinoids
It's better if you establish skin care goals and discuss with a dermatologist as self buying unsuitable products will waste money than seeking suitable products with dermatologist opinion