using only SDL2 to make 2D games

I have a doubt about using only SDL2 to make my first 2D game and I am new in this business of creating games, but I don't know if it really is a good practice to use in my future games. 

Beginner questions:

Is it good to use only SDL2 for my own game engine? 

Should I use OpenGL or other bookstores (SFML, DirectX, ...)? 

Should I use a game engine already created to make my games (Unity, Unreal, ...)? 

What do I advise as a novice game creator?