What I do is dip the pen in water first and draw a water line on a piece of cardboard to get things flowing. Next I put a drop of ink on the bottom side of the nib and go back to the card board and make a bold line. I draw a couple of straight lines on the card board pulling the pen toward me until the line thins out to what I want. I go to my bow, press the nib point to the bow to make a dot to get thing flowing and work off that dot to make the first word.
I can usually do the entire inscription with one load of ink, if the pen starts skipping I wipe that line off and start my pen loading process over starting with the drop of ink on the bottom of the nib and making lines on cardboard. I prefer the cardboard back of a legal pad for my test lines.