Any start advice ? Leveling etc (Leviathan server)

[Niwashi]

If you do just the main scenario quests and important sidequests (ones with the plus sign on the icon), you'll get a lot of your gear from those, but might occasionally want to craft or purchase some gear upgrades to supplement your quest rewards.

If you also do other sidequests, you'll generally get enough gear from quest rewards (and the occasional dungeon drop when you get lucky) that you won't need to.

For the first 20 or so levels especially, doing all the sidequests will level you much faster than you progress through the story. I'm not sure whether you care about that, but if you're the type of player who prefers to be on-level with their main story quests, then you might want to skip a lot of the optional sidequests on your first class (leaving them for if/when you level up additional classes) at least through the early part of the game. (As you get further in and it starts taking more XP to keep leveling up, you could start including more of those optional sidequests again.)

Take your time to explore and have fun.

There's a lot of general advice we could offer here, but without knowing which parts of the game you'll find obvious and which you could use help with, I'm not sure what advice to give. So maybe it's best to leave it at that and you can come back and ask more questions as you get them.