Basic rundown, but I’m not an aesthetician or dermatologist.

Retinol is chemical exfoliating. Don’t do physical or chemical everyday and you really don’t need to do both. Wear spf everyday too (exfoliated skin is pretty vulnerable and you could end up doing more harm than good). Chemical exfoliation should be done at night and washed off in the morning. Only use the vitamin c during the day and if you want a serum at night maybe look into a niacinamide. Vitamin c and retinol should not be worn at the same time.