You might want to do the basic beginner's guide to C2
which will show/teach you the basic workflow and the basics of how to work with C2.
You would then see that your issue with a bounding collision box is because you haven't set correctly the collision polygon of your sprite.
Then you might want then to also check my tutorial Asteroid in less than 100 events
which will take you even a bit further.
It will show you a few tricks about respawn and warp, different waves/levels of asteroids and more.
You might also want to check the manual, especially the interface
part which will answer some of your questions.
Finally, once you'll have already gone through all this previous documentation you can check the "How do I FAQ
" that has a lot of examples about different mechanics and technic stuff like "attracting objects one to another".