What's the difference between electrons and an electric current ? How do they flow ?

It' s just one of the axioms in physics. you  have to accept it as it is true. Don't think much otherwise you won't be able to concentrate in your studies. I had the same difficulty when I was your age.

Hi Caryl, electric current can be described in either of two ways.

1. Electron flow (from the negative terminal to the positive terminal)

2. Conventional flow (from the positive terminal to the negative terminal)

It was discovered that what actually flows in a circuit is the negative charges (electrons) and that's why electron flow was adopted as an option, however every circuit analysis will use Conventional current, NOT electron flow. Crazy, I know, but before it was discovered that it was the negative electrons that flow, people thought it was positive charge carriers that flow, and that's why circuit analysis started out using conventional current.

Good luck