I will create you a forum type environment for the user to navigate, within this forum will be user selected categories that they wish to enter into (related toward said "pubg" tournament). Each forum sub category will have different tournament types that the user wishes to enter into, ie. USA, DUO entry fee $5, lets say one chooses this category, they will be assigned to this category redirecting them to payment field requiring them to use a authenticated payment before they were to officially be entered into the tournament. From there the "Admin" would then either accept this payment and confirm that it has been verified and approved or decline it, payments will NOT be automatically processed by the website, an admin or owner will have to approve of the payment. This helps from fraud and people who accidentally entered into the wrong category for there selected tournament.