home page issues

Hello!

I am using [BUILDER] – PremiumPress Page Builder, responsive directory theme
Version 1.8

Is there a video with directions to edit this home page?

I am having issues with the home page slider element.
1. must i download the slider from core theme plugins or is the default one all i need?
2. on the element page, it says select images. I can only select 1, each time i select the next image i loose the first one. However i have text boxes for 3 images.
3.what size images are required? as you can see i am not filling that huge white space. must the images fill all that white space to the left of the boxes?
4. I have changed the header to all the suggested options and i seem to always have a ton of white, wasted space( prime real estate). Any suggestions as to reduce wasted space?
thank you,
Best, Deb