You're right, abdl seems to be more widespread in places like the UK or the USA.
I live in the country next to Spain, and the one who is more similar in terms of culture and language, Portugal.
There are few differences between both, apart from history the major one would be the language, but even then, a Portuguese and a Spanish person can hold a conversation speaking in their own languages. That's how similar both languages are. All in all both our cultures and societies are so similar that we sometimes call the Spanish 'nuestros hermanos', that is Spanish for 'our brothers'.
From my experience, it's not impossible but I think it's going to be more difficult finding people with this lifestyle here in the Iberian peninsula.
Also I don't know how good your Spanish is and that can be a barrier too in the first months.
The good news is that a lot of English people, and from other European countries too but especially from the UK, enjoy visiting or moving out to Portugal or Spain.