There’s nothing wrong with that, it’s a learning process and you are not a transmission specialist neither am I.
I will say whether you are an amateur mechanic, seasoned veteran or the king of transmission servicing, the attitude how you approach the job should be the same, you need enough time to do the job correctly or redo it if something was missed. You need to be methodical, take your time, take pictures for reference before disassembling and be extremely clean in your work (especially working on transmissions) and you need the correct replacement parts. Close enough is not good enough, no excuses.
Working on the transmission and removing the valve body, means 17 bolts for the valve body itself, plus the 5 or 6 for the filter. The valve body bolts are different lengths and if only one bolt goes in the wrong hole, you’ll have problems. You also need to confirm you have the gear selector shaft pawl engaged correctly otherwise you’ll have selection issues.
The rest is easy, verify the kickdown cable is inserted into the cam correctly, have someone operate the throttle whilst you watch beneath, it should turn easily and remain in its hole.
The transmission ID number helps, but I would need the VIN also since transmissions are items that can be swapped from car to car.
The rest of the job is bolt torque specs, fluid level and checks for leaks, and if no damage was done during the last service, you hopefully will have saved the transmission from needing an expensive rebuild.
