MikroTik Hotspot & Portal Setup

I need my MikroTik RB5009UG to run a pay-per-use Wi-Fi hotspot fed by a Starlink Standard 4x connection under the brand IVOIRHOTSPOT. Users must see a clean captive portal that shows our name, lets them pick a pass (1 hour, 2 hours, or 1 day), then routes them straight to payment via Orange Money...