Welcome! There are many first time laser owners here (myself included), so you aren’t alone. @jordanloshinsky and other regulars here took the time to put together a repository of a lot of helpful links. Link Repository - collection of links
Otherwise, I would say just look through this forum, there is a lot of helpful advice and tips from very knowledgeable people.
Personally for software, I’m planning on learning Fusion 360 (if you search for that, there are a lot of topics on it and some nice tutorials in the forum) for 3d models.