I am a beginner in unity. I would like to create music festival virtual world. But I have no idea where can I get DJ tool, lighting setting etc, I mean music festival environment. Could I get some advice about this.
These types of models are generally called Game Assets. If you search online for “3D Game Assets”, you’ll find dozens of sites - some free, some paid…
To start with, however, you would be best advised to just use primitives (eg a cube for the decks). If you use those in the early development process, your project will be lighter and you can concentrate on the function. There are tutorials available on lighting, for example Unity’s 4-hour course, which will give you a good start there.
Obviously, you’ll need to be able to handle audio so think about a good audio course. Again, Unity do one.
As a beginner in Unity, you are aiming really high for your first project. I always suggest getting something less ambitious for a first project. Take some beginner courses, build something smaller but take it right through to completion.
Good luck!