It's a VERY popular machine and almost every coffee Youtube channel has done a tutorial/tips video on it, but I've found there is also a great deal of bullshit banded around.
By far the most useful and straightforward is by this guy https://www.youtube.com/watch?v=d0g8umpINGQ&t=463s
He's done a load of vids and they're all real good. There is SO much information out there about espresso it's a proper minefield to a new starter.
I'd 100% recommend a good set of scales and the distributor/tamp tool. Also, order some beans direct from a local/decent independent roasters and they'll give you some good advice for what dose/grind setting is best for what they're providing you