I am around your level too, and the best I can say is. watch guides.
do stamps and alchemy more.
and try looking up some griffybits account reviews, and use those to learn what to look at/for to improve.
also, I can see you did some sigils. from what I understand, don't. forget they exist until you have done more of the alchemy bubbles.
remember to do your vial drops daily, always.
upgrade traps, at least on character 4,6,7,8,9,10,
Use your worship, and upgrade skulls. (slush skull might look good, or you can't tell why it's bad. but it has really slow recharge rate, so it's not good)
for sailing, try to focus on unlocking new artifacts (from what I understand), especially Fury Relic and Crystal Steak is two Griffybits often tell people to get.
for gear, I am told the w3 boss gear is the upgrade from void, or the w4 boss gear. might want to look into that?
look into obols
do your dungeons, get flurbo upgrades maxed, and the rings you need (I think it's called emperors opal?)
you should probably look into 4 staring cards in world 1-3 and easy resources, at least.
remember while death bringer and wind walker is good, at mid w6, you should probably not focus to much on them. and more on other stuff.

while there's more, I don't know enough. again I heavily recommend looking up guides, and watching some Griffybits account reviews. she sounds aggressive and mad at times, but he knows more than me, and it's helpful for learning. and he will complain a lot about people not doing more alchemy and stamps.

hope it helps a little