make sure you get the hShop app instead of blindly installing CIAs from PC, that program automatically fetches the required stuff you'd need so your console doesn't crash when trying to launch it

Tons of different things to do. Check out as much homebrew apps as you can and there's some cool ones out there, it really brought my old 3DS back from the grave lol

yeah its good id get hshop for games and pretendo for... and modded mk7 as it even has custom servers too!