yes your right, they eat insects, snails, berries, grasses sometimes even snakes...But be careful they love vegetables and other goodies like potatoes!!
Dont worry too much because they are rarely aggresive, more gentle and placid and just wish to be left alone, although they do have 50 teeth which is the most teeth in ANY other mammal...
They do have oppasable thumbs(dexterous) were are mainly used for climbing and just prety much grabbing stuff(like your nugs)lol and just gettin a good grip on whatever they need to
When it 'played dead' like you said it actually is doing that just because its scared obviosouly and doesnt wish to fight..they call it 'playing oppsosum' which is faking that your dead, but overall they are ALMOST always harmless..kind of interesting if you ask me..
Hope that helps with any backround info you might of wanted to know!!