Pavel's comment pointed me in the correct direction. I went into the Helix template presets and found a work around. For the template preset I first picked, the menu drop down background color was set by default to be the same as the font color, and I was not able to correct in the properties. I selected a different template preset and the dropdown background color is fine. I will probably end up setting up my desired colors in the custom settings area.
The form builder was still giving me problems in that it was buggy, sometimes working and sometimes not. I will probably end up using a google form page to achive our club's requirements.
I have been scouring docs online to try and resolve issues on my own. I've been using SP pagebuilder for just two days so the learning curve is great and there's still more to learn.