I'm guessing even 3 decades isnt enough, no matter how much you learn PI is there keeping up with you all the way and keeping you progressing forward. Orion is a spectacular and easy target to shoot and can be tricky to process (can be done with jpeg but not recommended) there is a lot of fine structure in the surrounding black to bring uot and that central overexposure to tone down too so it presents a lot of challenges to learn all in one easy target.
print it, hang it on the wall, in a years time shoot orion again and see how far your knowledge then takes it, year later it'll be better again etc etc. great start.