I did speed read thru the responses thus far and though it has been touched on, here is something that is so essential: When you make your best effort to speak Spanish in Spain, they will either let you do what you can or stop and say, I speak English. Then you can say, "Yo soy de Finlandia, con acento inglés." Laugh as hard as you can and then jump into English and apologize for your terrible humour.
Making an effort to speak Spanish will go a very long way. On the Camino, you get to do this many times, each day.
Now, seriously, some good suggestions have been given. But there is room for expansion of good ideas. Making a list of phrases in English and Spanish, (French too maybe?), is a good idea. And keep them simple, ie.
Cafe con leche, por favor -> Coffee with milk, please.
Una cama, por, favor (The most important sentence you will ever need) -> One bed, please.
Agua, por favor -> Water, please
Where is the bus station? -> Donde esta la estación del bus (or) le tren?
"Donde esta," Is an essential phrase to find what you need. A few minutes with GoogleTranslate will help build the list. The only other phrase needed is, "Muchas Gracias," pronounced, moo-chas gra-thee-as (Castilian - picky which "s's" they pronounce as an "s." The rest they use the "th," sound.)
For quick, easy training, and free, I have been studying on Duolingo.