@lori Nice SE/30! I did a video recently talking about first steps on inspecting new-to-you vintage Macs, this may help: https://www.youtube.com/watch?v=aXpl-DDyhUo
The SE/30 can be a beast to repair. I'd certainly not make it your first recap job!
1st thing I'd do is get a looong Torx 15 screwdriver and open it up to assess any battery/cap damage. Don't power it on!
Bruce and I have plenty of videos covering recapping this particular Mac. LMK if you have any questions and share photos once you crack it open! 🙂