About 50% of Sanlucar people are involved in hashish bussines. You hard find weed, but hash, all you want directly from Morocco.
Fiesta, all you want in Sanlucar. The people there are very friendly, open and funny. You will enjoy it. The weather is hot.
And in general, you will find that in Spain, we live very well. The only problem with Sanlucar is it was a fisher village for many time, and as fishes are decreasing, many people lost their jobs. Its a city with a very high ratio of jobless people, because of that, and marine tradition, now they do contraband with morocco (tobacco, and since a time ago, hashish).
But its a nice small city, and near you have nice big cities and the larger Natural Reserve in Europe (DoƱana), and excelent beaches.
And, about the food, Spain and France are the best countries in the world, with one difference, Spain are cheaper.
Since Spain is in the UE, and Shengen space, you can travel to the rest UE countries easily if you want.
You wont have any adaption problems, you are going to arrive when millions of tourist (most europeans) do.
Enjoy it!