My biggest piece of advice would be to make sure you have enough food... since you need it to replenish stamina! And stamina is drained in a lot of things like the gauntlet, campaign, hunting, and mining!
If you'd like, I can send you some things to help you start :)
Do take a bit of time to poke around the site and familiarize yourself with profession activities and test out areas like the Campaign for story driven content, Gauntlet, and the Arena for PvP (or PvBot if the queue is low). Each week has a designated weekly event shop, with activities that grant you tickets for that shop upon completion, so do make sure to check that out, as the items and companions available are different from that of the Mole Market.
If you're feeling at a bit of a loss at what to do, Achievements can help give you a driving goal to work towards, as well as some neat exclusive rewards tied to them!
The community is quite welcoming and eager to help, so don't hesitate to ask around if you're ever in need of assistance! I hope you enjoy your time here! ヾ(•ω•`)o