Hi @kittycatcf -
I'll do my best to get you some resources! I think it's great that you want to spruce up your home page. It's like decorating your classroom.
After viewing any of these resources, feel free to respond with any follow-up questions. I love designing courses (visual elements included), so I'd be happy to point you in the right direction.
I'm fairly sure that the templates that were created by the Instructure Instructional Design Team include instructions on how to customize the items included in the downloaded files! (Which I think is super cool.)
I also enjoy using canva.com for button creation. Additionally, explore pixabay.com and unsplash.com for free images without worrying about copyright.