Hmmm...no flasher, eh? First thing I would do is to get yourself a spring bobber so you can see the light bites. You see, without the flasher, you are going to have to guess what depth to fish. What I used to do was cut a small, round rubber band and tie it on the line with a tight overhand double-knot. You should be able to trim it close enough for it to easily be reeled up onto your spool. Once I find the level the fish are at, I slide that rubber band up, or down the line, so it just touches the water when I am at the right depth.
Good Luck,
Jim