Somewhere there is a "soldering for dummies" thread here on RCU that I started a couple of years ago. But I can't find it now!
And, no, I don't think the 60w iron would be enough. In fact, I'd say forget the "gun" type irons and just get a straight soldering iron (with a big fat 1/4" fit). Any hardware store should have one for less than $20 bucks. The sort of "torch" you would need for 3% silver soldering are any of cheap ones with the small flame. I have one that runs off a kind of BIC-lighter insert. Personally, I like the iron, because I feel it gives me more control on where the heat goes, but lots of guys prefer the small burners.