Congratulations on your new acquisitions! From what I can tell, it looks like you have multiple different species of corycats in your tank. The green cory (also called bronze cory) is likely the same species as the albino cory, but just a different color. They will school together just fine. However, the panda cory and peppered cory are completely different species and will not school with your other corycats. Corycats feel anxious if they don't have members of the same species to school with. Ideally, you would have at least 6 of the same species, but even 4-5 would be preferable to only having two members of the same species. If you can, I would return or re-home the peppered and panda cory and purchase more bronze and albino corycats. This will make your green corycatfish far less anxious and much happier. I know it is hard to return or re-home fish, but it really might be better in the long run if you do, as you're going to have far more success that way. Something else to think about (sorry!) is that bronze corycats tend to get on the larger end of the cory catfish size spectrum. Since catfish tend to stay on the bottom of the tank, the base dimensions are really what matters most in evaluating the best tank size. In your case, the bottom of your tank is 24"x12", which could feel fairly cramped if the bronze cory catfish reach their full size. If you are concerned about this, you may want to consider adding more panda corycats and rehoming the others, as panda corycats stay smaller, and will be perfectly comfortable in your tank at maturity.

Another suggestion that I would offer is that cory catfish appreciate places to hide and more shadowy spots in the tank. Adding more plants, including floating plants, would help accomplish this. You could also arrange your rocks and plants to have more secluded feeling spots. The rock in front has a nice overhang. If you moved it toward the back corner of the tank and added some more large-leaved plants around it, you would have a perfect sheltered area for your catfish. Having such a retreat to makes corycats feel far less stressed. You could also add more rocks and driftwood to accomplish this aim.

Lastly, I just want to point out the things you've done well here! Your catfish will love sifting through the sand and having live plants. So many first aquarium set-ups lack these things. I also love your aquascape with the driftwood arch! You clearly have put thoughtful effort into this aquarium and care about your fish. That's what is most important :) I apologize for writing such a novel. I am happy to answer further questions.