Hi Vivek,
Sounds like you had a great "first light" for your new toy.
The way you describe the images of Rigel and Canopus is the way they should look -- like tiny intense, brilliant points of light. Except the Sun, all the stars are way, way too far away to be resolved as a disc like the Sun, Moon or the planets.
Assuming your 'scope has a 4-vane spider, bright stars should also have 4 diffraction spikes 90 degrees apart. These spikes are caused by the vanes holding your secondary mirror and the wave nature of light. They are generally only seen on fairly bright stars. If it is a 3-vane spider, it will show 6 spikes 60 degrees apart.
The very largest and most sophisticated telescopes can produce "synthesized" images of the surface of a handful of other stars via interferometry -- even so, the images are pretty poor and not well sampled. For example see here:
http://en.wikipedia.org/wiki/Betelgeuse
Stars become much, much more interesting when they are in double and multiple systems, and when many are gathered together in a cluster. As noted above by Ron, Rigel is a double star, but the companion star is very faint by comparison to Rigel itself and pretty close in. Now you know that I'll bet you look for it and find it with the 9mm ep.
Hope you've got a basic star-atlas to find some more of these things.
Make sure you join an astronomy club where there will be lots of people to help you along the way and help you to find lots of interesting things to look at.
Best,
Les D
Contributing Editor
AS&T