I live in the up north on the east coast and while it is getting warm (today was ~83F), the water temperature is still around 48F


I only have a 3/2 rip curl...here's a link for reference:
https://www.ripcurl.com/us/shop/wetsuit ... 2-wetsuit/
I was hoping to avoid buying a new suit to save $$$, and was wondering what if I pair my current 3/2 with 5mm boots and gloves and bought a wetsuit vest w/ a hood that I could wear underneath that would keep my core warmer with the extra 2mm padding? My legs and arms would be "exposed" ... but I was wondering if this would work or would I still be too cold? In the future for when I buy a thicker suit ... I imagine the vest could be applicable in those setups as well if its a cold day or whatever. I don't see a point in 3mm gloves and would my feet really suffer that much if I use the 5mm boots for a longer time instead "downgrading" to 3mm for when the water gets warmer but isnt warm enough to go barefoot?
thanks for reading!