Hi, I am in the process of trying to update the site of a nonprofit I am interning for. They have a custom theme that was made for them but it isn't serving their purposes anymore . I am wondering if it would be possible to activate another theme that I have uploaded, try it out, and if it doesn't work, I could switch back to the custom theme. Does activating a default theme make it impossible to "press undo" and just go back to the old theme?
I can't make the changes they need myself because I have no CSS, HTML, whatever experience.
I'm reading about plugins and widgets which all seem really helpful! But I don't seem to know how to figure out if the current (custom) theme is "widget enabled". SOMEONE HELP.