Font customization

Hi!

I’m very new to wordpress and all of this stuff but I found great resources online and managed to build something with the help of your plug-in.
My main question is:
Is there anyway I can change the font on the forms and the search fields?

Another question is:
I’m using the events listing theme, as suggested on your website. The Submit button on the forms had no background previously and it was only text. I managed to add a background color with CSS. What I can’t manage to do is change the text “Submit” (within the button) to another color. Could anyone provide any help on this?

Again, I’m very new at this and I apologize if some of the solutions are very obvious.

Thank you!