@John_Fishman There is a thread that details options - (1) you can ride in ERG and make some adjustments in the workout player but you often don’t test yourself well that way and it is a lot to manage during a test, (2) your can use level mode or (3) you can export the workout to Zwift so you can utilize the click using the directions in the thread.
You could also (4) just use the ramp or 20 minute test on Zwift in their workout library. It will get you to roughly the same place. You won’t get MAP, AC or NM values but I don’t think that will matter much since you are just starting out.
@John_Fishman You should be in ERG mode during the ramp and then switch to level mode after the ramp for the constrained effort. Here is a tutorial on level mode.
@John_Fishman Righty tighty, lefty loosely - unless you are dealing with pedals where the left pedal is reverse threaded and so both pedals are tightened towards the front of the bike and loosened towards the rear of the bike. Get a pedal wrench for better leverage and use proper anti-seize compound on the pedal threads and leather gloves to protect your hands.
@John_Fishman You would need the right tools for that - usually a chain whip and cassette tool and a long adjustable wrench and when you mount the cassette you need to torque it properly.