Sounds like the motor is stuck or there is a short in the circuit if the fuse blows straight away.

To access the motor:

Remove the glove box.

Detach the central junction box from the bulkhead and lay it to one side.

Unscrew and remove the bolt from the defrost air duct.

Remove the defrost air duct.

Disconnect the blower motor connector. (replace fuse with motor disconnected to rule out that in the circuit)

Detach the air intake flap actuation cable.

Remove the air intake flap.

Remove the blower motor.

Reinstall the components in reverse order.