Setting up Vlans on Openwrt

I would like to set up three vlans on my router (Xiaomi Mi AX3000t) which has openwrt installed. The vlans is for myself, my housemate and the smart devices in the house. All vlans are accessed via Wifi. Can someone please guide me to where I can find the steps to set up the vlans on the wifi.

Did you try your favourite search engine before posting?

This is a common question, so there will be search results that will help you to define an actual question to ask (and should already be sufficient to get it working).