Wont let me play

I went t fortnite.com and downloaded the epic games app to get fortnite I went to the home and typed on fortnit to download it, it popped up “owned” and then showed I needed an update to get it then that popup went away and I cant figure out where to actually download fortnite on my computer, I don’t know where to find the update again to get fortnite but it says I own it? thank you for your help -Ginny