Please feel welcome and relaxed here
Hello my friend.
Please feel relaxed and comfortable here. You don't ever need to apologize for writing at another's talk page or making a mistake. If someone posts here at your talk, you have every right to remove it, but you needn't feel upset. We work collaboratively here and all get along quite well. We welcome you into the community.
If someone disagrees with an edit, they may revert it, but either way, it doesn't mean they're fighting with you or dislike you. There's no hostility.