upgrade tips?

I’m 1k Bought economy (Y) EWR to DXB Upgrade waitlist (miles and money) for Polaris but am 16 and only 5 left I’m considering just buying the upgrade ($5k) but it’s so much

A seat in premium plus just popped up for $1500

If I upgrade to premium plus, what happens to my position on Polaris? Will it be significantly improved or I’m screwed any way bc too many GS ahead of me?