it's gonna sound fake as heck and funny but i honestly think there's really no "terrible" way of decorating an island. plus i don't think any skill sets are needed here at all. it's just so incredibly subjective to what each person's preferences are as an individual. a super decked out in a certain theme/style island could easily have zero appeal to me personally despite what others deem it to be "beautiful" or "cool." the reason being is simply because my taste doesn't align with it, y'know what i mean?
the takeaway point i hope to send across is that at the end of the day, if what you have appeals to you then that's all that matters. the first step to get there is to really try and not compare your island/progress to other people
just make your own flow and go with it. don't be shy to take things apart and try again if you need to.