If people are talking about Andalusia (Andalucia), they will think directly to Sevilla. While actually Malaga is also a gem that most people usually forget...
1. First thing first: communicate is hard if you don't understand basic Spanish.
I did learn Spanish a bit for a year and to be honest I forgot almost everything, after 3 days in Spain I just remembered some words (thanks to google) and finally can get my life a bit easier. The locals they speak English but not so many, even in some tapas bars they will prefer Spanish over English and sometimes you have to count on your body language just to order a food because you will never know the name.
2. Spaniards: souriants
I JUST LOVE HOW SMILEY AND FRIENDLY THE PEOPLE ARE. (note: even if you don't speak Spanish)
3. Sorry to be sounded so greedy but I just love how they put the electricity outlet here and there beside your table. Just bring your charger everywhere, you will survive.
4. Well not that survived, because usually they don't have wifi.
5. Make sure you download your offline map on your phone, or bought a map. I have to be honest that walking will be tiring because from one place to another is kind of far in Malaga but worth the view!