Relearning Spanish for a vacation in Spain [closed]

My family and I are taking a vacation to Spain (covering Madrid and Barcelona) in three month's time. I'm the only person in my family who knows a lick of Spanish.

I've been enrolled in Spanish classes in school from first grade to twelfth grade (USA), and while I don't consider myself a fluent speaker at all, I do consider myself a proficient reader and writer.

However, after four years in university of not using Spanish (thanks, STEM major), I'm afraid I can't remember various common nouns or how to conjugate in common tenses (like the conditional or the subjunctive), at least not off the top of my head.

I've heard that while Barcelona is very tourist-friendly, Madrid is a bit more cultural and knowing a base level of Spanish would be helpful in making the experience more fluid.

Since I'm going to have free time before the vacation, I was wondering if there are any good resources to brush up on my Spanish. Note that the importance here isn't that I need to learn a new language, but rather jolt my memory regarding conversational Spanish (ordering food, asking for directions, small talk, etc.).

Any help would be greatly appreciated!