Welcome to the best gun collectors forum on the web!
For your specific topic I’d highly recommend stopping on by the Lee Enfield forum. Just being up a forum list and you’ll find them down lower on the list. Great place with a wealth of knowledge on all things relating to these fine rifles. History, restoration, loading ammo for. Anything you could want. Welcome again.
You've found a good place. I've gotten a lot of good help here. I recovered a sporterized one myself. Financially, didn't make sense for me but I had fun a learned a lot. The family connection for you definitely makes it worthwhile though. Don't hesitate to reach out if you need help. (Either PM or a general post.)