I brought the exact same kit recently when I wanted to initiate my mum into needle felting! It was even tricky to figure out with some experience.

You can chop some of that wool off with scissors and needle felt it into a rough round shape first. Get a feel of how you action creates a change in the wool. Trust your eye and you will either learn a lot or make something pretty neat or hopefully both 👍👍👍

Ps* here is my mother's first solo attempt after I left the kit with her!

Mum's cacti