how do I get wordpress on my website

You can change your theme at any given time. There might be some faults with the theme you chose so maybe switching to a new theme will help. In your back office, you can click Appearance --> Themes and then click the plus sign that says "Add new theme"

Sylvia - this should help: How to Change, Manage and Delete Themes in WordPress

Yes, changing your Wordpress theme should be the solution.
In the WA search bar type in: How to change my theme.
Good luck. :)