Mikrotik connection to one access point (AP) of two networks via VLANs?

Question

WiFi

Good afternoon.
Colleagues, please help to realize the idea. In the figure, it is highlighted in red for clarity, the task.
Purpose: from one access point (AP) distribute different networks.
Given:
There is a router that accepts the Internet. In my case, this is Mikrotik RB1100x4. It has 2 DCHP servers configured, each on its own VLAN, for its own task. First vlan: VLAN20 - for office LAN; second vlan: VLAN30 - for guest access.
As I understand it, it is necessary to configure my access point to receive a trunk, and further divide it into vlans. One for the existing wlan, the other for virtual. Each of them has its own SSID and access. Mikrotik GrooveA acts as an access point .
No matter how I set it up, it doesn't work. Haven't found anything on the internet yet. Throw someone a link to a step-by-step setup, preferably not a code from the terminal: D, but fish without fish and cancer: D

Answer 1

Everything is there with examples: https://wiki.mikrotik.com/wiki/Manual:Interface/VLAN
With WLAN interfaces, you yourself understood everything correctly - one real, the second virtual, with different security profiles. Consider both of them as normal access ports with untagged vlan.