Not enough space on my phone

I bought Nokia 2 3 months ago. N is really frustrating n am very disappointed. There’s isn’t enough space on it n the apps that are already on the device is not even important. There’s no music player n other apps. You have to install them yet you can’t cause it keeps telling you not enough space. I inserted external SD card which is 16GB yet the problem is still persisting. N the phone keeps heating. I bought the phone at Nokia office directly. I have been there to make this complaint yet nothing has been done. You need to upgrade the device. Am very furious n frustrated right now. There’s no app on my phone as am speaking.