1. The first title section of each page should have an H1 tag. Apply Heading 1 (H1) to the title in the first text box to the left. Afterall, it is the first and most important heading. Font size of 36pt might look nice.
2. Some of the white text might be tough to see against this image, especially for a visually-impaired person. Apply an overlay effect of a .7 black tint to the image background. Some images will not need as strong a tint for the text to be seen, but we've generally seen that applying up to a .7 or .8 tint to the background image will be more than sufficient.