I’ll give you a piece of advice from my own store of not-that-naturally-gifted. Put your bass to one side and find a funky drum beat on the net.
Make up your own bass line in your head - if you sit there with a bass you might find something by luck and you might not.
if you dream the baseline in your head, you’ll know where the notes fit in the pattern when you pick up the bass. Try and find any one of them and play it in the right place, then add more one or two at a time.
some people can just riff this kind of thing off instantly. Sadly I’m not one of them and I find this way easier