Also depends on what type of opensource project you're looking for. Small but promising, then owner will rather no doubts welcome any help. Or big and popular, than you perhaps follow some serious guidelines for PRs you want to submit.
As for knowledge, of course it is important. But I would always give priority to projects where owners are able to explain things to newbies, for that would mean they perfectly understandwhat they are up to, and thus provide their project with good potential.
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Also depends on what type of opensource project you're looking for. Small but promising, then owner will rather no doubts welcome any help. Or big and popular, than you perhaps follow some serious guidelines for PRs you want to submit.
As for knowledge, of course it is important. But I would always give priority to projects where owners are able to explain things to newbies, for that would mean they perfectly understandwhat they are up to, and thus provide their project with good potential.