Toyota 1998 oil?

Hey, I got an 1998 Toyota Corolla petrol and I haven’t changed the oil so far.
I was wondering if anyone knows what is the best oil to use for an 1998 Corolla ?
do you have an owner manual? if so it will say what weight to use. also check your oil cap, they usually have the weight on the cap. as far as what brand to use, well that is up to you.