I agree with what @cdwoodcox
said. Littermates/two puppies same age are a lot of work, but it is possible to be successful. Mine are male/female, 7 months old. Can't speak to the same sex, but I understand that will be harder at adolescence.
I think separating the crates is a good idea, but personally, we (my husband and I) didn't do that. One of us took one out to the bathroom, while the other one stayed in with the other one. Some whining from one at the beginning, but that eventually subsided. Keep separating them and eventually, they'll get used to it, at least from my short experience.
At the beginning, my husband would take one for a walk while I stayed in and trained the other, and then we switched. By the time they were 4/5 months old, I could train them together and still do. Teach one a trick/command, treat, then the other one. They've gotten used to waiting their turn, amazingly. But I do suggest, at this age, separating them quite a bit to help bond with you.
It is possible to raise two at a time, but I will tell you personally it has been very trying on my patience, health, emotions, you name it. To do it right, it takes a lot of sacrifices. I'm still making those sacrifices. If you're dedicated to them, you can do it and be successful. Good luck!