Hey guys I was trying to hook-up my new radio to my 04 camry and while I was connecting radio antenna jack to my new stereo there was a minor spark. The car was off no keys. Plus I have installed stereos many times in many of my friends' cars. Then to check I tried hooking my OEM stereo back to the car and that stopped working too?
Is is fuse? If so where can I find it? The one near/under steering wheel has like 30 fuses with abbrevations. So I don't know which exactly to check?

Please help.

Thanks in advance.

Check all under dash and under hood fuses with a test light or multimeter. Easy to do and will only take several minutes.

Wow
If you're the local stereo specialist, I would learn what a test light is and how to use it.
The next step is a multi meter, but I don't want to advance you too quickly.
You have RAD NO.1 which is 20A
And RAD NO.2 10A
If the dome don't light up, then check there dome fuse.
Some may be inside, some under the hood.
Once you've learned this, experience is priceless.