Your can find the official WooCommerce documentation here: WC Docs. This should aid with most issues and will be expanded over time. Hit us up via email if something is missing.
If you have feature requests we have an ideas board here.
Bugs and code contributions should be submitted to GitHub here.
If you do need support, before doing so check the WooCommerce > System Status page. This can often reveal errors which you may not know about.
We'll occasionally stop by here too, but your more likely to get a response on our forums ;)
Thanks and I hope you enjoy working with WooCommerce!