The lottery is over, and the Cavs will not be picking first. It's a bummer, but the team will have to move on. Instead, the Cavs have the 24th pick in the draft. The Bulls had the option to swap picks with the Cavs but then the Cavs were better than the Bulls so there isn't a reason to swap. The Bulls were also eliminated by the Cavs last week. Not sure what purpose that history lesson serves, but it's satisfying and that's probably good enough.
Cavs fans actually do have some experience picking in the second half of the first round. Tyler Zeller and Sergey Karasev were popular picks, and both still have chances to be good NBA role players (LET ME HAVE SERGEY!). In general, you are looking for guys who can stick in the league. It's rare you find a Jimmy Butler or Chandler Parsons, but they exist. In Chad Ford's latest mock draft (Insider), done immediately after the lottery, the Cavs select Rondae Hollis-Jefferson of Arizona.
With the strong play of Matthew Dellavedova in the playoffs and the elite point guards in the draft all off the board, the Cavs can move on to other needs. One is a long-term sub for LeBron James. Shawn Marion and James Jones will both be gone, and Hollis-Jefferson is the one sophomore who can come in and play right away thanks to his stellar defensive abilities. If he were a better shooter, he'd be a top-10 pick. Justin Anderson, Terry Rozier and Christian Wood could all be nice picks here, as well.
Trevor actually did an awesome profile on Hollis-Jefferson last week. Give it a read. He seems like a solid fit for the Cavs. I'd like to see the Cavs add a young big, but a wing defender sounds nice as well.