Ok those errors are clearly related to the fastfield, I can sort of tell because of the # at the beginning which is a bit unique. It might not hurt to leave them, otherwise you can find all them likely in those chunks that make up the templates that you showed us. (like [[$home-full-screen]])
Yes, you've got your three panels are working ... on all pages now, great! Sooner or later you will need to 'fix' the front page, and I do think tracking down this text won't be too hard when needed. Obviously you have learned quite a bit about where stuff is stored, and we can help.
For the pictures, usually they are on the back end, that's the third tab "Files" in your Modx manager.
You seem to have an 'images' folder, you can upload all the images you want to that folder.
Anyway those are also in the code you changed, in the three panels' chunks, under the text, here:
<img src="assets/images/img_3.jpg" alt="our next event" />
Just upload the pics you want and change the name of the picture in the code on those three panels, you will likely want to change the first or last one as they are the same now. You could even make them match the front page
[ed. note: nuan88 last edited this post 7 years, 10 months ago.]