Hi Chris and welcome! A very good choice of scope. I note that your scope is tracking not go to. Does it have a magnified finderscope or a red dot finder. Both are very useful, but if you have a magnified finderscope you may have trouble pointing the scope in the right direction. A Telrad is a very useful accessory and one that I would recommend getting early.
Re eyepieces, yes the smaller the focal length of the eyepiece the higher the magnification. Mag=fl of scope/fl of eyepiece.
Do you know a few constellations? If you know a couple, you have a basis for learning more. So Orion, Sirius and the Southern Cross are a good start for the moment. Also if you can find the Magellanic Clouds, you have a wealth of things to look at straight away.
If you don't know any constellations, it might be worth seeing if there are local astronomy groups or local IIS members to help get you started. Worth doing anyway. You can learn heaps.
I agree with Liz about stellarium. Cartes du ciel is another good free program.
Have patience and you will have great fun.
BTW Jupiter is the brightest thing in the western sky in early evening at the moment. Should be easy to find.
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