I used to play a lot of Fortnite prior to Season 5 (Don't really like the turn the game is taking, it's less enjoyable to me)
When I played Fortnite I'd watch a lot of Ninja (Like everybody and their grandmothers) to take pointers from how he played and attempted to bring it in the game to improve my gameplay, which it did!
I also took shadowplay (An Nvidia program that records every death, and any highlights) and found out why I was dying, and worked toward making sure I'd no longer run into the issue, this helped immensely