Travel Itinerary

We will be traveling next April to Spain. It is our first time. As of now we are planning for 10 nights. Landing in Barcelona and spending 4 nights. Flying to Malaga/Marbella for 3 nights. Taking a train to Seville for 3 nights and flying home. We are big on just wondering and exploring finding places to stop and have some good food and drinks. Not super into museums and similar activities. Is this a good trip for a first time visit? I feel like we are missing a lot of important places but I feel like these three combined will give us a nice variety and we will have enough time to explore them.