Paul is more experienced, but the way I would start out is.
Install TheSkyX
Install the driver
Connect USB cable to mount
Set mount into balance position and reengage the gear.
Power up mount
Sync the laptop time in Windows
Run TheSkyX
Make sure your location is set (Google earth can give long/lat)
Tell TheSkyX to Connect to mount (I assume its an older mount and you select the COM port first – newer mounts don’t need that)
Tell TheSkyX to Home (listen for 2 tones as it slews in RA/Dec)
Choose a target not far from Home position using the cursor and slew to that… Watch the OTA to check it moves in both Dec and RA….
If it does all that okay you’re 9/10ths there.
Personally I would ignore the hand controller until everything works fine from the computer as thats the best way to schedule a public viewing.
It may not end up pointing at the target you selected until the thing is polar aligned. Doing a brief manual TPoint was the way I worked out the adjustment initially using an OTA with a 1 degree FOV. TPoint provides instruction on whether the Azimuth or altitude needs adjustment – and how much.
Theres a list of error messages here: https://www.bisque.com/wp-content/cs-content/help/scripting/thesky6/software_bisque_error_codes.htm
I couldn’t find error 2003. Did you mean 22003?