Hey Ali, I'm Luna, I'm a spanish native speaker from Santiago, Chile, I would like to improve my english skills too! So i can help you with spanish : ) 

I think it depends to the place where you are going, in spanish speaking places at least very few people speak english in daily life, unlike the airports where everything it's translated to english, so it may be helpful to learn specific sentences to use in different situations, for example to get directions, to buy things to eat (specially food vocabulary might be helpful to know what you're buying) and vocabulary to describe things in case you need to. Oh! and basics to survive, like use the bathroom and transportation. If you need to learn spanish I can help you with that, it could be useful specially with sentences in context, and how to use them.
I hope this helps you

It happens to me sometimes too with english! (I'm native spanish speaker) I think what helped me a lot is to hear conversations, and remember phrases, specially from series, movies and songs. They stuck in your mind and make them feel more natural to use, reading books has helped me too. If you want to, we can talk and practise, that helps a lot, specially if you have specific doubts about how to say sentences in an specific context, I have struggles sometimes with that too, because translators hardly do that.
I Hope this helps you, Saludos!

Hola! yo soy hablante nativa de español de Santiago, Chile. Sé muy poco de francés, pero podemos hablar en español,
Saludos!

se que en netflix está la opción de activar subtitulos en español (a mi me ha dejado en español y tambien en inglés)

: )