Looking for a theme

Good day!

I want to run a website on a WordPress template. I don’t understand about sites and programming. I need your advice to make the right decision.

Short description. The function of the site is a message board. We will have two groups of clients, customers and performers. Performers will pay a commission for the right to receive work from the customer. The contractor can see the customer’s contacts only after payment.

The site must work in Russian.

I think Classiads - Classified Ads WordPress Theme will suit me. But I do not know if this is so? Can it perform the required functions?

Will a Regular License work for me?