Best app/website to learn a language that you already know decently well?

Long story short, I am going to Colombia in a month and a half. I took Spanish for 6 years in my youth but I haven’t used it in years so I have lost most of the speaking. I can still read the language very easily and can understand decently well when someone speaks it, but I need to brush up and refresh my memory. What is the best way to learn while skipping the basic parts like vocabulary?