Audio Questions and door panels

I'm completey unaware of what I'm gettign mysefl into I've laways been hands on and very handy but heres what iw ant to do : update my audio system so i want to buy all new speakers, but not being a true audio guy i have no idea what i shoudl buy for a new system so any help ther woudl be great also i want to make fiberglass door panels i knwo there are a few threads with this topic but none in complete lamens terms i can understand so i need help i want my doors to look unique any ideas woudl be awesome!

Hey! Did you ever find the info you needed to make the fiberglass door panels?

If I can help with that, please let me know. We can 3D print classic car parts --plastics, composites, & most metals.