Yeah, I know a bit about metal clay. There are three types out now, silver, gold and bronze. Silver is the most common. There are two main brands of silver clay- PMC and Art Clay Silver. There are mild variances in how the two handle, but they are more alike than they are different. Depending on which brand and which kind of which brand, you can expect the piece you make to shrink between 10-40% from its clay state. It's also pretty fragile until it's fired. It dries extremely easily and it is really brittle once dry.
All of the metal clays must be sintered. This means a minimum temperature of about 1300 degrees F (650 C) which is way too hot for your oven. The length of time is dependent upon the temperature. If you don't want to use a kiln, it can be done with a simple hand torch- I've used the creme brule torch someone gave me as a Christmas present in a pinch.
To torch fire, you need to be sure to follow a few simple rules-
You can't fire anything that has any stones or glass in it.
You can't fire any large items. Personally, I wouldn't go above twenty grams with a hand torch but a book can tell you better.
Yes once it's fired resin can be poured inside. Once silver clay has sintered together it is fine silver and can be used in any way you would use metal.
As far as books, I like Sherri Haab's books on just about anything. (That's the author you're referencing.) But my friend who is more serious about metal clay, prefers Jackie Truty's. Hope this helps.