To sound like xxxx is not about 100% pitch, actually 90% is from acting and your natural timbre and the rest from the pitch of voice.
That where voice comes from affect sound a lot (does is come from a chest? Head?), how you pronounce things like tone wise.
If you just lower your voice pitch on Audacity and do no effort on acting, it will not sound like a boy’s voice but more like a low girl or even worse - very fake and unnatural. (If you ever pitch your voice down with Audacity, do it wisely and only few keys down, never an octave or half-octave)
Voice acting is not a wishcraft but a skill that you need to work with to get good at. Sure, you can google some tutorials but the practice is the biggest thing.
If you want to sound more like a boy as a girl, listen some real boys and voice acted ones from cartoon for reference and try to imitate how they speak and such.