Only way to learn needlecraft is to do the procedure and learn the feel yourself. No one can teach that to you. That's why accredited fellowships throw you in the procedure schedule on day one.
I did a med school PMR rotation as a med student and was allowed to do epidurals for God's sake.
No one held my hand as a resident doing any spine procedure, and I got to do stim cases and kyphos too.
To say you need to be slowly weaned into the needle is absurd, but a non accredited program is essentially a private practice who allows you to learn on their patients so that's why you probably didn't get to do a lot.
I know a lot of people who do interventional pain that didn't do a fellowship. You definitely can do that assuming your residency prepared you for it. Emory certainly does.