Of course you will!

I think one of the most important...if not THE most important...trick to language learning is not being afraid of making mistakes.

My Japanese friends in Japan would sometimes call what I spoke ジョン語 as I accidently made some humorous errors and assumptions in the language, but I would always say "Tell me when I make a mistake"... Unfortunately ジョン語 had some cache' and some of them would use my mistaken Japanese when talking to me, so some wrong words got to be bad habits.