"So these are proto-galaxy clouds we think?"

>a surprising finding that could help researchers better understand the origins of galaxies.

"Massive cloud of just hydrogen, like what was present early after the Big Bang?"

>The cloud, made up of hydrogen atoms

"That could collapse to start and build young massive stars?"

>Their unexpected discovery will support numerical simulations to explain how Stephan’s Quintet formed

Was just trying to help... The last one is talking about origin of galaxies, but the cloud isn't nearly dense enough to be forming stars. If you have other questions that were not answered in the article, you did not list them here.