Malaga city can be quite hectic.
Not on the same scale as Madrid or Barcelona, but still
Malaga province which encompasses most of the Costa del Sol will allow you to have a calmer pace of life though. Although some areas do get a bit crazy during certain seasons.
When I originally moved from London, placed like Mijas Pueblo seemed idealic to me due to the more sedate lifestyle. Although I don’t live there now, it might work for you. Calmer village life with the more hectic life of otwns and cities nearby.