how should I improve my pixel art?

how should I improve my pixel art?

Hi, I'm sbird, and I'm learning how to pixel art!

I'm making a platformer where you have to try to get materials to build a raft to escape a deserted island. I've made a tileset that looks beachy and the resources (water bottles, sticks, logs, and rope)

how should I improve my pixel art? The tileset looks okayish, but the resources don't look good at all. Is the outline too much? Any tips for me to improve my pixel art?

 

for reference, I'm using this palette: https://lospec.com/palette-list/warm-breeze-on-sunny-days (i just searched "beach" on lospec)

should I keep using this palette or should I try using a different palette with more colours? or should I not use a palette at all as a beginner?

Attachments: 
Preview
coast-tileset-scaled.png coast-tileset-scaled.png 11.2 Kb [1 download(s)]
Preview
water-bottle.png water-bottle.png 555 b [1 download(s)]
Preview
sticks.png sticks.png 598 b [1 download(s)]
Preview
small-log.png small-log.png 493 b [1 download(s)]
Preview
log.png log.png 651 b [1 download(s)]