Best of luck to ya bro. I've gotta say I expected to come to this thread and see someone with a dying plant or something but these are easy questions.
1. Yes that's enough light if they are 100 actual watts not equivalent. 1 plant in veg needs appx 100 watts per plant and 2-3 times that in flower so you should be golden, oh they will love you for the mixed spectrum to
2. I already answered if it was enough but yes it keeps popping the breaker because it's overloading your breaker. You can use another outlet in the room but 9 times out of 10 those outlets are wired inline with the others. You also gotta remember that your heater will pull a lot and will prob trip the breaker to so you just gotta try it and see.
But be careful electricity is nothing to play with and you only want about a 70-75% load on each breaker. So say you have a 20 amp breaker you wouldn't want over 17.5 constant amps on it to leave room for spikes and such. Just see what's all on that breaker and move other things in your house on a different outlet.