If you want to place text on top of the background image, make sure that the text is easy to read. Adding a color overlay on the background image could help with this. You can do this in the section background settings by enabling the "Overlay" option. You can choose the color and transparency for the overlay. The higher the number in the transparency field is, the less visible the background image is.
You can also create images with text for example in Photoshop, but please note that in cases where text is in the image, the search engines will not "see" the text and on mobile, the image, and the text in it, may become too small to read. So always prefer texts added with the website editor if possible. And hey, they’re also easier to update that way!