[Routine Help] - Beginner retinol / vitamin C recommendations?

Beauty Tips For Body Care
Hello,My current skin care routine is as follows:AM: - cleanser - the ordinary caffiene solution for undereye dark circles - moisturizer (Aveeno) - sunscreen (LaRoche)PM: - cleanse (Cerave hydrating cleanser) - ordinary undereye - Cerave PM facial moisturizerI've been doing this for the past 2-3 months. It's been working well.But now, I'm looking to add in a Vitamin C cerum in the mornings, and also add in a retinol about once a week to start with. I've tried searching for posts but some are quite old and with very mixed opinions. So decided to post here and see if anyone can help.Do you have any recommendations for effective vitamin C/retinol, but not too expensive?Thank you!
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Submitted by UMax_