Yeh, although it's difficult to help without knowing what you're using equipment-wise.
The biggest tip I can give for FL would be to give the manual a read, it really is very valuable.
If you're not using a controller, and simply using a mouse and keyboard to create everything, then to make a bassline you load up a synth (the Bassline synth works well for this
), then create the groove in the Piano Roll. Here you can change the velocity, glide of the notes and all that jazz. To make variations, just copy the bassline and paste it into a new pattern, then edit how you wish.
Experimentation and reading the manual are the two biggest tips I can give for FL.
Hope this helps,
Rob.