Since only one of my machines came with a manual (and that one was just like the one I learned to sew on) no I don't read the manual first.
However I do like to know what model machine it is so if I have issues I can look online and find out if I'm using the right bobbin, have it threaded correctly, etc.
I just found a "new" one today for $3.99 at a nearby Goodwill. It is from the mid 60s. Needs a bit of cleaning up and a bobbin cover and bobbin.