Good on ya mate for wanting to get out there and give it a go. Summer is generally the safer time of year to get into it. Have a search throught the forum for previous threads on rips etc.. as there should be heaps.
Rips are actually not such a bad thing when you are looking for a wave!They are the brown swirly parts of the beach with a lot of confused water on it. You just pretty much have to keep an eye on the ones that get really big and pull you out past the breakers. If ever caught in one that is really strong look for clearer water and paddle parralel to the beach. If in trouble dont panic and follow surf life saving procedure (have a look through web sites for that.
There can be waves any where along the coast given the right conditions. Scarborough/Trigg area is popular. Lancelin's back beach is definately worth a look but note Im not sure there is life savers there?
Always try and surf with a mate that makes it a lot safer. There is a lot to be covered from your post mate, have a scroll through the forum for more info and good luck