Mac Laptop + Noob

Collaborations

I am trying to learn Blender mostly for fun. I have a Macbook Pro and no external keyboard or mouse. 

I'm trying to follow a beginner's course (the rocket launch) and I am having a hard time replicating the operations. The hot keys and mouse clicks don't all work. My pentagon turned into a fish when I tried to scale it down slightly.

Before I get a mouse and keyboard, I wanted to ask if this will even work the same on a Mac? I am not sure how much of the difference is Mac vs PC, or just Mac on a laptop.

Thanks for your help!