Solid wood is generally understood to be lumber or timber, that is pieces of wood sawn from a tree. This is distinct from engineered wood or manufactured wood products which include MDF, plywood, and OSB. Engineered wood is made of fibers or strands that are pressed or glued, there is more in the final stock than just wood (I.e., glue, lignin separated via heating and pressing).
I would recommend prowlarr instead of jackett for indexer management, and pihole as at least an additional blocking service but in reality it’s really all you need for use at home. I’d also strongly encourage use of a VPN on your *arr download services. I use a separate box to run Plex and then have my *arrs all running on their own VM inside if it to provide separation and allow be to more easily segregate the network traffic (as someone that doesn’t really know docker that well it “just works” for me. Also probably worth looking at how to store your media on an external target, it’s easy to quickly accumulate 10s of TBs of media and trying to store that all on the server locally is asking for trouble. Better to set everything up on a NAS to start.
Another plus one for Proton with your own domain.
Self hosting sounds good, but it’s fraught with mines that if you don’t know what you’re doing can take from “can’t send email because my domains been back listed” to “everything in my network is now sending spam to the entire world”. Sure, many folks self hosting sounds with no issues, but the price for configuring something wrong can be steep and IMO is just not worth the trouble and risks when there are good options for encrypted, privacy protecting email services for a reasonable price.