How to Create two wifi networks with different WLAN in Mikrotik 951ui-2HnD

Hello Engineers of this forum:

I received a warm greeting, my name is Oswaldo Gaitan I am from Colombia and I need your help, I bought a mikrotik 951Ui-2HnD they told my that I could configure two wifi networks with different WLAN network, but I do not know how to do it I could not find a tutorial.

I have two Internet providers the first one is called ETB and the second UNE, I have the routers that they gave me and they are on the first floor.
I want to create with the Mikrotik two Wi-Fi networks with the two internet providers separetely on the second floor.

How can I do that?

I appreciate your help.

Sincerely.

OSWALDO GAITAN
Greetings and blessings!!