First of all, welcome to our humble and wonderful game, and we hope to see you stick around!
Second, however, is that I, personally, would say try a few of the other ships first. Judgement has had some mixed opinions about it, some absolutely love it, others are less enthusiastic.
As for piloting, I would learn some of the base ships first, such as Goldfish, Pyra, and Junker. These give a good baseline on piloting and are really good for beginners, and they keep current throughout your lifetime through the game. Goldie is the bread-and-butter of GOIO.
Easiest way to try and figure out a build? Try and find a higher level and ask if you can crew with them aboard a Judgement. You can get a build suggestion from anyone, but until you see it in action, it's hard to tell if it's the right build for you. Crewing one while in a less-than-critical role, i.e. Gunner, gives you some time to understand how the ship fits together, and how it works for your playstyle.
Other than that, trial and effort. That's pretty much how every single meta and offbuild that GOIO offers formed, through a lot of attempts, not a few explosions, and the wonderful Eureka moment when you finally piece that fun, efficient build together.
Good luck, and fair winds!
