A bit late, but if you do not need fancy, I can recommend the Ocean Endeavour from Intrepid.
We sailed with them last December and had a blast, there were options to do Citizen science on every zodiac cruise and we were able to view any waterbears etc collected in water samples on our return.
https://www.intrepidtravel.com/uk/antarctica
The expedition team were also able to talk at high levels about most subjects with specialists in many areas. We even had a team onboard with specialist equipment (robot) which was deployed to look for the colossal squid when we were out and about.
The Endeavour is not a fancy ship, but the food was excellent and the expeditions could not be faulted.
if interested check you can check out my photo book here:
https://www.rjt.org.uk/home/archives/13527/antarctica-argentina-travel-book/
