While there are bolted routes at Tarana and on ACT granite in the easier grades, these tend to be relatively run-out and a bit spaced. Top roping stuff is a good way to build technique and confidence. However I suspect your best bet is to tag along on second. You will get more out of this in terms of learning to place protection and also get to do heaps better routes.
Stuff like Legoland is a worthwhile venue for locals in summer who want to stay in touch with it all without getting fried. Gibraltar and the other ACT craglets are likewise fun for a half day but it is advisable to get a local to show you around as it is often hard to find routes. If you are willing to drive all the way to Canberra for a granite education Booroomba is where it is at.