Well worthwhile is a matter of taste, game is fairly sandbox so you kinda do what you want to do. If you want to level fast then you need to truck on questing, or potentially grind(aoe grinding seems particularily viable, respawn rate seems fairly high and aoes are potent enough but can't get that many mobs at once). The crafting/farming stuff is interesting cause it's quite different than standard mmo, having a farm, growing shit, finding out you need more space but you don't have it so taking the risks of planting in unsecured areas where people might come and steal your shit(and by might I mean will). Growing shit to do traderoutes for gildas and/or money, increasing crafting when no one is actually very high and selling overpriced shit like clipper boat repair items, stuff like that.
Can also do the daily dungeon. I just did it, it was actually pretty cool. First it's doable with only 2people(and max is 3, which is weird when group size seems to be 4) and for the daily you want 1 under 30 and 1 over 30, finding the 30+ can be annoying though. The bosses have fairly basic mechanics but still quite interesting to see and it's alright xp it seems even at 30+ due to the quest xp.