First Time to DIY install Car Stereo

Hi, I just bought and received the XTRONS TQ700L universal double din car stereo online with Octa core and Bluetooth 5.0， HDMI, looks great. It is my first time to DIＹ instal car stereo and I don't like to mess up with it. I can follow the instruction, but there are many cables, do I connect them one by one? Does it matter with the orders or not? Thanks for your instruction.

You'll get some great info here as a lot of folks will be willing to share the knowledge. But first, you may have to provide some additional details. What Make, Model, Year of car? Does the car have a factory premium branded stereo (Bose; Rockford; JBL; ect...)