The website that I will copy and paste below will tell you about how volcanoes are formed and of their different types.

https://www.3dgeography.co.uk/volcano-diagrams

Maybe you could create a fact file about the different types of volcano and find examples of them around the world.

As a challenge, can you find out what and where the Ring of Fire is?

Are there more volcanoes on land or in the depths of the oceans?