Welcome! Happy to help as more specific questions come to mind, but in general, here's a directory of links to very helpful guides and player resources which might be able to point you in the right direction. https://www.shroudoftheavatar.com/?page_id=59279
Be sure to check out the official player guide: https://docs.google.com/document/d/1Z-svq1OvcZwViqGxFCKdjH3NCn2LTfLuGny5qaAqjTM/pub
quest guide http://sota.ultimacodex.com/game-guide/story/ https://ladykathleenrealm.com/shroud-of-the-avatar-quests/
I think that one of the best places to start is the Quick Reference Guide, it has not be updated in a while and it misses some of the newer changes such as the addition of the trader and universe chat channels, but it is still a good place to see the most important things at a glance.
Hi and welcome! I haven't been playing that long myself, and made every stupid mistake I can imagine, so if you have questions, don't hesitate to ask here. The folks here helped me out of a tight spot or two Ysold