If you are just trying out climbing you do not need to buy a harness, climbing shoes, helmet, etc…
Indoor climbing centres have shoes and harnesses available for hire.
I also have a few harnesses and helmets at your disposal, nevertheless, for outdoor lessons, I cannot provide everyone with climbing shoes.
Any required gear that might be necessary for outdoor climbing might be hired from Outdoorhire or any other sports hire company of your choice.
Outdoorhire provides entry level climbing shoes HERE.