96 Ranger. I replaced the clutch. Now it won't go into gear

I’m no mechanic and I’m stuck.

I’ve got a 1996 2.3L Ford Ranger. I replaced The clutch disk, pressure plate, pilot bearing, and release bearing. I then got the transmission put back into place. Once I attached the shifter knob I noticed that I can’t put the transmission into any gear with the engine off. I then attached the slave cylinder and attempted to engage the clutch and shift. Still no avail. If I depress the clutch it is firm and if and look through the dust cover underneath I can see that the bearing is moving about an inch or so.

Any ideas or advice would be greatly appreciated!