Hey new guy welcome to the club. You're going to enjoy that Garrett 250. I have the 350 and just started a few months ago myself in July.
You have a good machine to start learning on. All the other members are going to tell you it takes about 100 hours of actual swing time and dig time to really get a feel for the machine. Let me tell you, they're not joking.
I started out by learning one side of the machine at a time. And I'm still learning LOL. Good luck and have fun out there