I'm using a well-known podcast as inspiration for a pet project of mine
How does your podcast compare to theirs?
Not as good as theirs. Luckily, they have good jokes that I can use.
You shouldn't use their jokes in your podcast. People will notice and call you a joke stealer.
How else will I create a funny podcast?
You need to create your own jokes and ideas for your podcast. Stealing ideas from others is wrong and people will notice.