what can my amp do?

As many as you want to say.  That's about how important it is.

The pleasure your system gives  you in your car is what is important.  If you truly want to learn, learn this first:  don't get caught up in the power / watts hype.  If you have carefully set up your system and prepared the car, the components will not likely be bombarded with too much power (if that is your worry).

Amplifiers put out power per channel.  If using a four channel amp and the front channels are powering the components, the rear channels will put out rated power whether the front channels are used or not.

https://www.the12volt.com/caraudio/woofer_configurations.asp

It really dose not matter how many wats you run to your speakers it'sa braging number. You can here when they are starting to distort. The power that speaker can handle is really just a number they put on it. It really has no meaning to what the speaker can take. With that being said if you hear the speaker starting to sound like crap. Well that is a good sign to turn it down.

Your system will only use a few wats of power at any given time when your playiing your system. Its just when you hit the peaks in the song that the system will draw more. Sorry don't know the fancy words to explane this better and I know there is some one on here that can do it better

Bridging your amp normally you take the Right - and the Left + to bridge an amp.

Hopefully my rambling helped.

I thought of something I could add to this.  A component set with a 1" tweeter will handle more power than a set that has a .75" tweeter.  A respected brand will handle power better than a cheap brand.  A 6.5 mid driver will handle power in the freq range that crosses with a sub better than a 5.25 driver.

There is a tutorial in www.bcae1.com titled "measuring amplifier output".  It's a bench test using a very controlled procedure, and I've never done it because I don't have all the equipment necessary to do it.  But it's the only true way to know how much power an amplifier is putting out.