Cybersecurity Homelab Ideas with Raspberry Pi 4

Hello, I recently got a raspberry Pi 4 starter kit as well as a 5 port switch for Christmas and I’ve been wanting to do a homelab either cybersecurity related or something like a personal cloud server or movie and tv streaming service related so that I can stop paying for different apps monthly. I want to go into cybersecurity and doing a project will help when I put it on my resume since I’m 18 with no experience. Does anyone have any ideas on what to recommend me do?