It depends, what type of resource pack are you looking for? Pvp? Texture based? Something close to the main game?
You can find tons of texture packs on different websites. Search on Google "Minecraft (version) texture/resource pack" and there will be a lot of websites that come up. All you'll have to do is download them!
Usually they give you directions. Check your downloads folder on your computer, or you should be able to get there directly from the website. I use Firefox as my browser to get downloads, and it automatically let's me into my downloads and drag it to my desktop. If you still can't figure it out, I advise looking it up because it may be different for everyone depending on what you use. Hope this helps!
Thanks for letting me format system32 because a online internet website said I had to do it for download.......... internet is lie