It honestly depends on whether you are good at languages; as I'm passionate about French, I'm finding the work a doddle and hope to carry on learning it at A-Level (though, judging by the past papers I've seen, I might regret that decision!). Languages are appreciated like humanities, yet what matters the most is whether you will enjoy it - enjoyment of a subject can heavily influence the overall grade that you will get, and you wouldn't be remotely pleased if you failed after putting in a lot of effort!
Still, if you do select a MFL, I'd recommend either French or Spanish (despite not speaking it, I know that it is quite similar to French), though German might float your boat. Don't panic about the listening and speaking elements - everyone in my class feels a bit insecure about speaking out loud in a foreign language, but practise certainly makes perfect!