I fell for a scam today. I feel like if I can't protect myself from scams how am I meant to protect systems.

Today I fell for a phone scam on Facebook marketplace for context I am a 3rd year cybersecurity student studying at a UK university. maybe I'm overthinking this but I feel like If I fell for a scam and was very gullible to it how would I be able to protect systems and people from phishing if I fell for a scam myself.

I feel like an imposter.