Visual studio Version for unity 2019.1.2

i am new to unity and i downloaded unity 2019.1.2f1
i want to download visual studio for my unity version (2019.1.2f1)
but i have two questions.
first, is unity 2019.1.2f1 supports visual studio 2015 “without problems”?

second, I did not see Visual Studio in Edit> Preferences> external tools and only “browse” there. Should Visual Studio be add to unity by browse?

Have you gone through this?
Its better if you use Visual Studio Code instead of Visual Studio
It’ll increase the performance (If your’e using any budget PC/Laptop)
Also you can use extensions for Visual Studio code

All the best!

Please answer. Thanks.

Visual Studio Code does not require Visual Studio to be installed, it is independent.