Some important questions I wondered about the New G5 [PLEASE ANSWER]

I was interested in the new G5 with i5 and GTX 1650 because it fits in my budget
I need a laptop to bring it to school and do game development/programming and also playing games.

-Now I have read a lot of heat problem with the G3,G5 and I wondered how is the cooling on this laptop, which  degrees do you hit when you play hard games?.

-Also I need to bring it to school so also important is the battery life, How long does the battery go before dying??

-It comes with a 500 somewhat SSD but could I add another HDD in it? short question how it the upgradeabilitys??

-And how would the performance be, could i edit videos on it?,at which FPS could I play most games?, Could it render 3D models with Blender for example? 

I really need to know al those questions, if someone could answer them quickly I would be happy. Already THX!