Welcome! Don’t be too worried, you can try posting some stuff and see how it’s received. Based on how you wrote this comment, I think you won’t have much trouble. The New User Guide and other stuff gets worded a bit sternly because of the people who tend not to put in much effort at all and expect to be well received – which doesn’t sound like you at all. It’s hard hard to write one document that’s stern to those who need it and more welcoming to those who need that, unfortunately.
Welcome! Don’t be too worried, you can try posting some stuff and see how it’s received. Based on how you wrote this comment, I think you won’t have much trouble. The New User Guide and other stuff gets worded a bit sternly because of the people who tend not to put in much effort at all and expect to be well received – which doesn’t sound like you at all. It’s hard hard to write one document that’s stern to those who need it and more welcoming to those who need that, unfortunately.