Hi paul, good start, were these taken hand held or on a tripod? the shutter speeds seem a bit slow to me and i can see some camera shake in pic2, dont be afraid to bump up the ISO to get the faster shutter speeds. 1 other thing, try to get the critters to look at you when you shoot them, not always easy i know but makes all the difference.
good work paul keep it up, macro is damn good fun, challenging at times but worth all the effort.
Oh,1 last thought, have a play with a bit of fill light from the onboard flash, make a diffuser if needs be, it really does add punch to macro shots, i never looked back after i started using flash.