I want the Big Sur picture on my opening page please. How do I get rid of this too colorful page?

Thank you Jack. Appreciate it. The other images haven't downloaded after updating to Big Sur. I dread this time of year as my hard drive crashed with the Catalina update.It's a horrible ordeal to take a 28 inch desktop into an Apple Store. So was waiting and this morning I had no Safari access. So forced to update. Now I can't find some of my email accounts but will try to do later as I get tired of fooling with this every year. But I value your input except that the pictures I have to choose from now are strange too. Thank you . Regards, Ingrid