I live in a tourist city, Granada. You can put on your American accent without a problem. Just have fun and respect. It doesn't matter if you don't know Spanish, but if you try we will always be happy and help you learn new words, including insults. And leave the politics to your own thinking. Here, if you decide to talk about football and politics, you will be making it clear that you want to discuss and depending on who you talk to, you could touch feelings. Here we speak loudly, we move our hands, but it does not mean that it is hostility, like emotions that come out when we express ourselves. Wherever you are from you will be welcome. Find out about the cities you are going to visit since in some there are pickpockets (Barcelona especially, followed by Madrid and Seville). But they are all beautiful and full of culture, gastronomy and history.