Hi there Kayleigh! Welcome to PokeCommunity, good to meet you. ^^
I'm new to competitive battling myself but thanks to all the experienced battlers here I've been learning a whole lot. Check out the
Battle Center for everything related to battling, they have some good battling guides and even places where you can get your team rated! We primarily use Pokemon Showdown as our battling platform of choice so you can easily drop by the
official server and get battling. You can build your favorite team through Showdown, too, so it doesn't require you to actually have the Pokemon in your game. I'd love to have some battles with you sometime! Do you have any preferred tiers? I love random batts, NU, and Little Cup. Don't have a team set on my Showdown account though, so I'll have to make one (unless it's random battle since the team is automatically generated for you).
Glad to see you decided to create an introduction as well, good choice. :D You're still a new user and still eligible - yay! I'm from the US too yeah, but there are so so many people here from the UK or Australia, haha. Sometimes I almost feel like there are more Australians on PC than Americans.. but that's a good thing since it makes the forum more diverse. I'd never have met people from all over the world otherwise. :)
And you are awesome for liking Slowking since he's my favorite Slowpoke evolution! I used him once in my Crystal game and loved it. He was always so bulky and very rarely ever fainted. One of these days I need to use him again, ahhh.
Anyways, great meeting you Kayleigh and hope you have an amazing time here! Be sure to let me know if you need any help with the forum!