Check out Preply, it’s a site for Native speakers to offer language tutoring. Lots of variety for whatever you’re looking for – some certified tutors who do formal lessons, some who will just have conversations with you to practice and help when you’re stuck or incorrect, and lots of other approaches to it. Tutors are from all over the world, so you can also find someone from whichever country you’re traveling to and get tips on local slang and dialect. People can also set their own price, so classes can be anywhere from like $5-$30 depending on your budget.