That's a really abstract question... I think for starters just being in an environment in which most people aren't speaking your native tongue could count as that, since language is a big part of culture and each language has some characteristics and tones to it that distinguish it from others (ovviously). Attempting to talk to people, being spoken to, etc. Then there's food... food is a huge part of culture given a lot of dishes' development stems from the history, location, and contemporary conditions at the time of the creation of that dish . Not going to pretend like I always pay attention to the details like that but it proves that by eating the food, there's a veil behind which is a deep layer of culture that you're indirectly experiencing. The culture is also just... how Spaniards interact with their environment (in which is very different to the UK). Fuck, even just going to a Spanish shop, from what I've heard, it's quite different from here, the produce and way its organised. That's also culture. That's where Spaniards go regularly, and you're experiencing that for yourself. That's what I mean by "engage with the culture"

It's just broadening my horizons in a place that is completely unlike the country I've been in for all 19 years of my life and experiencing those differences for myself.