[Liz]

Hi Grant
Your scope is certainly big enough for planets and stars!!

http://www.saxon.com.au/m_refl.html

It takes time and patience to find objects in the night sky .... it is only after quite a bit of practice, and after you can recognize constellations, that finding objects becomes easier.
Stellarium is a great free software program to help you, otherwise starcharts would be great too.
Bright stars and planets should be easy, as long as your scope is aligned properly, and collimated (hate collimation).
Your eyepieces should be 'OK' .... but down the track, when you can find objects, then upgrade
Good luck!!