I dont think you would get enjoyable results with intel graphics, keep searching for youtube videos of your system, remember if they were recorded with an screen recorder, you would get a little more fps without recording it.
I would consider 20 to 25 fps as playable, of yourse 40-50 fps is always smoother for heavy gamers
Please note that fps
stands for frames per second
and first person shooter
(game) as well.