Holy grails for 40+ skin?

I’m a recent convert to Korean skincare and have gotten a few products recently based on reviews here (BOJ sunscreen, cosrx booster serum, Cosrx snail mucin & haruharu black rice serum - the last 3 I rotate in no particular order through morning and evening).

I realize this is not full skincare as I’m missing a moisturizer and eye cream to top all this (and maybe other things as well?). I’ve also come to the realization that when I bought the above, I didn’t check to see if those it worked best for were younger and therefore required different ingredients than I do (perhaps not). All to say, I got excited on this sub, and and made some impulsive products 😃

It’s only been 3 weeks so too early to say if what I’ve bought is working, but I’m enjoying the attention I’m giving my skin. What effective products would you recommend that I add to my rotation? And Is there any I’m using now you’d recommend replacing with another?

Thank you so much in advance! 🙏