Create Mesh Netowk

Hi
I have two access point (hAp ac - Main Router and Wifi ) and hAP ac lite (Used as a ethernet brige)
The Wifi convrage is not so goog and I would lIke hAP ac lite to be used as mesh in order to increate wifh covrage
I understand it’s better to use CapsMan
Can some send me a turorial how to setup the hAP ac lite in order to increate wifi covrage
Thanks