We didn't have languages offered in school at a young age where I grew up, so I started learning my first second language when I was 19 and at university.  I learned my third and fourth languages when I was in my mid 30s and started my fifth language in my early 40s.  I'm still working on improving my last three languages, but I can speak them well enough to use them in everyday conversations and regularly in professional settings.  I work in a multilingual environment (English, French & German), so this helps, as does using iTalki.

I'll never be accent or error free, but I feel really strongly that you can learn languages as an adult.  Don't lose hope!