Hi do not know much but I can explain the basics of what you want.
First of all you go into your control panel of your website
To create, edit and configure widgets to enter vulletin cms / widgets
And to add them or arrange them in the cms go to:
vbulletin cms / layoutmaneger and edit home option
There you add the widgets you want it to be displayed in inches and fits your taste.
Greeting
I use this chat and the best because the other one is in the image gives many problems
https://vborg.vbsupport.ru/showthread.php?t=236970