Welcome! Glad you joined. OH MY GOSH - I can't imagine what you must have gone thru emotionally when you found out root cause. Hopefully she is getting mental health care somewhere. Years ago my very young niece 'punished' my sister's fish, killing them... but she was so young don't think she understood she was committing murder instead. I am SO sorry for your losses. I applaud your BBA - Bounce Back Ability. It is great for this hobby, and a wonderful life skill. You are a very strong person!
Have you considered starting your build thread? I found its a great place to document my tank's evolution for myself. I started tank first then joined, so I'm still finding myself going back collecting pictures & updating historically as well as current state. Once you create your first post in your thread under Forum > Member Aquariums and link it to your account, they will give you build badge (look left, under my ID)
This might help you find people local to you in Ovideo:
https://www.reef2reef.com/forums/local-reef-club-discussion.516/
This is a good reference book type online article I still review:
https://www.reef2reef.com/ams/the-supreme-guide-to-setting-up-a-saltwater-reef-aquarium.84/