I would kike to know the way to proceed in the first lecture of Deligne's Le groupe fondamental de la droite projective moins trois points.

General advices for reading Deligne's paper.

What should I know before reading Deligne's paper?

What should I have in mind while reading the paper?

Useful tools for reading the paper (for example Know what the yoga of motives is.)?

What are some references for algebraic geometry (if any) over tannakian categories (other than Deligne's Le groupe fondamental de la droite projective moins trois points).

Fell free to comment to improve the question.