Learning to play with clubs that don't fit you is like learning to drive roofing nails with a two pound hammer in the hopes that once you get good at it you will get a more suitable hammer. In the meantime you will develop every bad habit in the book trying to use the wrong tool for the job.
Height has nothing to do with club length. My son and I are the same height and his wrist to floor measurement is 3 inches less than mine. No decent club fitter would go by overall height to determine club length.
Shafts, even from the same company, marked the same way will not be identical. Even more so with shafts from different companies marked the same way.
Any so-called "fitting" where they have you hit a club and then go grab a supposedly identical club off of the rack for you to take home without checking the overall shaft dynamics for the flex and kick point for your swing, and finding and marking the optimum spine (or spines) position and inserting the correct shaft correctly in the club head is not much of a fitting at all.
Most people do as I did and either buy a set of clubs off of the rack or (in my case) have a set given to them. Sure, I could hit them. Actually played fairly well with them.
Would it have been easier to learn with better fitting clubs with the right MOI so I didn't have to use about 3 different swings through the bag? Absolutely.
I didn't have a clue why a few of those clubs were so easy to hit and others were like one giant correction all the way to the ball.