Is Unity easy or hard?
Unity is the perfect engine for a small indie-developer team. Working with it is quick and easy, and sharing a project with other developers is hassle-free.
Unity is extremely easy to get up and running on. There are a number of tutorials out there and a great community of people willing to help. If you already know some C# then you are in a good place. I was hired for my first professional software job to do development using Unity and C# having never once used either.
C++ is a good thing to learn if you're planning to work outside of Unity or want to develop native plugins. If you plan to stay in Unity or just want an easier language to learn first then C# is the way to go. Nothing else is worth your time unless you have a very specific reason.