Hello and welcome to Yoga props
There are plenty of items that can be used to help improve your yoga practice, to support your body to find more comfort and ease within a pose and to encourage you to relax within your practice.
As a beginner it can seem overwhelming trying to figure out what you need to get started - to be honest you don't need anything!
However a Yoga mat provides grip and cushioning and a space to practice within so this is the best place to start.
Have a look at my recommended items on my online store: https://www.yogawithrach.co.uk/shop/