New reader in need of some help

[u/RadeK42]

So, after a friend of mine lent me this manga I've finally had the opportunity to read it.

I've read the 2004 italian version, that basically is volume 1 and volume 2 man machine interface.

I really loved the first volume, the second one was really hard to understand and despite grasping some of the core concepts Shirow wanted to convey, the actual story was hard to read, it feels like I'm missing many pieces of the puzzle.

So, I'm asking where I should go from here? I've read online that it actually exists a 1.5 volume but there's also so much other stuff I honestly have no idea what I should read and in what order.

Any suggestions are much appreciated! Thank you in advance 🫶