https://www.zhihu.com/question/35899526
Look at what Wang Zhe (the leader of cocos2d-x) said. There is currently no easy-to-use IDE. The general approach is to use Visual Studio and Lua for C++. /js uses SublimeText.
The official tutorial is also a backward version. I recommend starting from cocos2d-x c++ to facilitate debugging. When you are familiar with the main control classes, consider using lua.
If you want to learn, just look at the engine Comes with examples, look at them bit by bit, and change them bit by bit to see the effect.
You can make a small game independently and find a job immediately. Don’t mess around by yourself.

cocos studio is the IDE. You will understand if you look up history. Many tutorials on the Internet are very old ~ that’s why.

Cocos Creator is out...Although there are still many pitfalls...But at least you can get started...

First of all, Cocos Code IDE has officially stopped operating updates, so there is no official download method. Therefore, you need to download the corresponding code editing tool separately. If you choose C++ as the project language, you can use VS to edit the code.

For the second question, you must first clarify whether you want to write logic through Lua, C++, or JS, and then determine whether you want to create a new corresponding project. From the project directory structure in your screenshot, we know that you chose the Lua language. I guess you clicked OK without looking carefully, so the Lua language project was created by default. The logic code files of Lua language are in the src directory in the project directory. Lua's code editing tools include LuaStudio, Sublime Text, etc. The subject can choose according to their own preferences.

If you want to use VS to open a C++ source code project, you need to find the file with the .sln suffix and double-click it to open it for debugging. You can search for the .sln file in the project directory. According to your project directory, it is in the frameworksruntime-srcproj.win32 directory.
In addition, although these tutorials on the official website are old, they are still very suitable for getting started. Official website tutorial URL

If it is C++ language, choose the tutorial option of Cocos2d-x. If it is js language, choose the tutorial option of Cocos2d-JS.
If it is lua language, choose the tutorial option of Quick-Cocos2d-x. As shown below:

Since the questioner did not clarify whether the logic should be written in Lua language, I will not post the link to the specific tutorial. The titles of introductory tutorials will all have words like "getting started" or "newbie", just look for them.
Finally, if the subject’s programming foundation is not very solid, it is recommended to learn u3d first. Because the learning cost of cocos2dx is more than one order of magnitude higher than that of u3d. Or as other respondents said, use Cocos Creator.