Button styling for beginners

Hi!

I’m working on a complete revamp for our organization website and have ZERO experience with code. I’ve been using the Visual Composer for the most part, which I love. So, that’s where I’m coming from. I have been using WordPress for blogging for a while, but have mostly done drag and drop editing.

My problem is the button styling on things like the submit button on forms. The button within the options, as well as what seems to be the default, has a line at the bottom, like a 3D option, but all I want is a flat button style with no border. I have no idea how or where to change things to accomplish what I want and am getting really frustrated. Attached a screen shot to demonstrate on a contact form with Ninja Forms. Has been the same issue when I just insert a button in the page for anything else. The other button options that were present when I first started the build are no longer active as well.

Help please! Again, keep in mind that my understanding of code is nil so any help offered will have to be in laymans terms 🙂

Thanks!