don't lie about simple, obvious things.
the proper answers are:
how old are you? [a goddamn number, don't be evasive]
what do you do in your spare time? [some normie shit, nobody ACTUALLY cares, they're just checking if you're a fucking weirdo]
just don't lie. If you go in believing you're not good enough how the fuck could the interviewer come to a different conclusion?