After nearly 69 years, I am still trying to figure out makeup, or at least foundation and concealer. You need to consider whether your skin is dry, oily, combo, balanced, or sensitive. And that’s before color! Counters at Nordstrom and I think Sephora can squirt out little samples. Makeup tends to oxidize on me so ends up darker than in the bottle.
Getting foundation color right at least for me has been really really hard. I’m Asian raised in the US so more tanned than you are likely to find in Asia. Most colors here are for white people and don’t have enough yellow for me. I think I found my color in a NARS line — which is breathtakingly expensive. Ugh!
Best wishes! Makeupalley.com has a lot of makeup reviews in addition to Ulta, Sephora, and Nordstrom.