theres not a lot about Alice's plasmoid just this page from astral adventurer's guide.

it says nothing about abilty score increases so i guess it's the usual +2 / +1 or +1 / +1 / +1 for you to choose as in every race. as it is stated in tashas cauldron of everything in customizing your origin.

has no subclasses or other evolution so you gotta be creative to make Alice into a metal shapeshifter slime.