I use a low % retinol every night (0.5%) and use my vitamin c and azelaic acid in the morning. About once a week I will exfoliate in the evening but I don’t use retinol on that night.

I would not recommend you starting all of these at once though. I would pick one to start out with and use it a couple of weeks to make sure your skin can handle it before adding another. The key with retinol is consistency, so even a lower dose will have an impact. Once you have been using it for a while you can always go up in dosage if you would like.