How to choose your first CAD course
Start with the job you want. Many general mechanical design roles use SolidWorks or Creo, automotive and aerospace teams often use CATIA or NX, and drawing and detailing work often starts with AutoCAD.
If you are a beginner, learn 2D drafting and engineering drawing first, then move to one 3D tool. Learning one tool well is better than touching four.
Ask your counsellor for a free demo class and try the software before you decide.