I had never aid climbed untill I tried to do an FA that was too hard for me. I wanted to get to the top so I made makeshift aiders from slings and the result was Spiders From Mars 5.9A2+ the grade was given on 2nd ascent by a genuine Yosemite big wall drunk..Thats what im planning on!
Be aware that SA solo the prow in yosemite and felt 100 feet. He is probably still with us because before, we learned about fall impact on the rope, to make sounds anchor and take time to do it. Too much climbers died today because there ego is too big.
What do you want to work out, what is the results of aid climbing that you expect?
is it knowing how to place pro: top rope and place a first pro, a cam, load it , use an other kind of protection, tricam, load it, and use a third kind of protection at the same place...a stopper for example. Load it and climb on it. Look at it carefully to see how he moves and why you are not falling. The best pro will be those where you fall. You never know when a pro is good, but you know when one piece is not.
is it to know the technique or a variety of technique? take a course, read a lot and climb with other experiences climber.
is it just to check a box, to told every body that you know how to aid climb...gave up!