i also just recently started at a judo gym too. from my experience, judo here is about 50% throws and 50% groundwork, where a good throw in judo is just as qualified as any submission in bjj.
there isn't much of a difference in terms of groundfighting. it is pretty much like bjj if you were to take it at a bjj gym. you can do chokes and armlocks, sweeps and escapes, flying submissions, etc. however, leglocks, neck cranks, or any form of bodylocks are not allowed for safety reasons. besides that, expect it to be like bjj rolling but with limited submission options.
yeah but bjj crew is super bias. They essentially the same thing but the focus is different. BJJ is all about the ground judo is all about the throws and control.
the groundwork in bjj is much much more extensive due to the rules you find in a bjj competition. judo doesnt reward groundwork enough for most judo guys to specialize in it..
bjj doesnt reward takedowns enough for most bjj guys to excel in them.
you see much more deep and complicated setups for takedowns in judo
you see much more deep and complicated groundwork in bjj.
Saying this as a guy who trains in bjj and judo I am going to say Judo is fan-fucking-tastic. If your after self defense, I recommend Judo > BJJ. In terms of roughness and getting fit Judo>BJJ. In terms of having fun when sparring BJJ>Judo
As for groundwork, it really depends where you train, most competition based schools are about 80% standing 20% ground. Having said that, those percentages vary depending on the school.