(Noobie) tinyhawk 2 freestyle questions.

Just got my new drone in the tiny hawk 2 freestyle. After about 40 hours of playing lift off before the drone ever came in. I’m doing great rolls flips ect. Yet I have a few questions pertaining the quad.

1) what camera angle should I be flying in and how do I tell that angle, for it dosnt give me any indication marks or anything about what degree I’m at? Could someone maybe link a pic of what about 30degrees would look like. I am use to 30 degrees for free style and 50 for racing via lift off.

2)1s vs2s batteries, will I get a longer flight time with 2s batteries? Also will I have to cut off and solder a new connector, or do they make adapters?

3) battery life it says 4 min flight time, however after about a minute maybe a minute and a half. My goggles will start to say low battery (usually when I go from less throttle to full power) are my batteries low? Or is it because I’m using a lot of throttle making the batteries drain faster aka tricking it into thinking low battery?

Thank you for any replies from another noob quad pilot!!