Hi There Sven! lol
Evening, go ahead and play!
Goodness, where do you think the term "air guitar" came from???? People making themselves look silly while having a great time! I tend to crank the music sky high and grab my guitar (which my hands won't let me play any more) and I strum and strum even though nowhere near tune or on key! But it still sounds good (with the music on loud.)
The only way you learn to play is to practice ... and that includes many straining notes.