Welcome @Minegamer117! Always great to have a new 3d modeler join the team. Right now we're in the midst of a complete graphical overhaul, including all of the organelles. That's where we come in.
If you want something to do, I've been having trouble with the Mitochondria and Endoplasmic Reticulum meshes. Mine come out too uniform and generic. You can try your hand at them if you want, we currently don't have any natural looking models for them.
This is what we're going for for our Mitochondria:
and this is concept art for our Endoplasmic Reticulum:
If texturing proves difficult, you can shoot me the meshes and I can create materials for them. The meshes are our biggest priority right now though.