The American public will not accept a draft. The only way the govt got away with all these wars since 911 was because of a volunteer military.
Current military leadership in the senior enlisted and officer ranks are not equipped to train draftees.
We have a hard enough time as it is dealing with the malcontents who freely volunteered. Often, we just open the door and let them wash out. It's not worth the effort. These service members are bad for unit cohesion and a risk to lives and expensive equipment.
Imagine dealing with draftees who absolutely don't want to be there at all? "F*** you, Sarge! I didn't sign up for this!"
The only way to do this effectively would be to administer swift, brutal corporal punishment, like the Russians do. The American public would not tolerate this and senior leadership, all of whom volunteered for service, would be reluctant to administer this kind of discipline for fear of reprisals.
I'm not so sure. A full-on propaganda campaign conducted through state-run media and tech would convince a lot of statist and woke parents to push kids to sign up.
Also, I imagine illegal immigrants will be signed up as well. Lincoln did something similar in the Civil War.