The most up-to-date information about OP Mainnet can always be found on the Optimism Community Hub. There you'll find material such as docs, tutorials, and collections of videos related to OP Mainnet. If there is any information that you think is missing, feel free to make an issue over on GitHub.
For usage issues, delayed funds, etc., please join our Discord and submit an issue in the appropriate channel (either #user-support or #dev-support)