My daughter and I were in Barcelona last week. We found everyone friendly and helpful. The city is charming and easy to navigate. We felt very safe; we walked everywhere, though wanted to use scooter rental Barcelona (we could have explored more) but since it was a little bit cold, we did lots of walking. My recommendation to potential travelers is to give yourself a week to explore and let yourself get lost. And if you have time, explore the neighbouring medieval towns, Rupit, Siurana, Besalu. Those are really charming and picturesque.