The interface is largly the same (minus the pro channel stuff).
Check out these videos: It was created for x2, but most all of it applies to the artist interface. This should be a good start. Then you can look deeper for the updated features added later elsewhere.
https://www.youtube.com/playlist?list=PLKRYWdEpbc5PgUgvrNuSvVyfv5qkll0qj 1. Audio Interface Setup - 7:24
2. Audio Interface Options - 8:20
3. MIDI Device Setup - 8:58
4. MIDI Clock & Sync - 10:19
5. Control Surface Setup - 14:20
6. File Options - 10:08
7. Plugin Manager - 6:44
8. Instrument Definitions - 10:09
9. GUI & Track Overview - 14:48
10. The Browser - 8:58
11. Multidock & Control Bar - 11:41
12. Inspector & Control View - 7:02
13. Piano Roll View & Screensets - 10:05
14. Project, Track & Bus Templates - 14:02
15. Exploring the Track - 14:35
16. Exploring the Track (Pt.2) - 14:50
17. Exploring the Track (Pt.3) - 13:55
18. Exploring the Track (Pt.4) - 7:52
19. MIDI Synths - 13:03
20. MIDI Synths (Pt.2) - 5:47
21. Session Drummer & Drum Maps - 12:13
22. Audio Routing - 13:06
23. Working with Video - 4:02
24. Audio & MIDI Basics - 23:26
25. MIDI Advanced - 10:46
26. The Matrix - 16:15
27. Step Sequencer - 12:03
28. Editing Basics - 11:47
29. Editing Basics (Pt.2) - 11:45
30. Editing Basics (Pt.3) - 16:17
31. Editing MIDI - 11:22
32. Editing MIDI (Pt.2) - 8:50
33. Staff View - 6:22
34. Comping and V-Vocal - 17:22 -
(V-Vocal not in X3)35. Groove Loops
(Clips) - 12:32
36. Working with Tempo - 10:24
37. Working with Audiosnap - 8:47
38. Working with Audiosnap (Pt.2) - 8:26
39. Working with Audiosnap (Pt.3) - 9:34
40. Working with Audiosnap (Pt.4) - 6:23
41. Console View - 9:32
42. Clean Up & Bouncing - 8:25
43. Control Groups & Gain Control - 10:24
44. Pro Channel & Side Chains - 12:56
45. Working with FX & FX Bins - 11:31
46. Working with FX Chains - 10:30
47. Working with Automation - 7:58
48. Working with Automation (Pt.2) - 10:53
49. Working with Automation (Pt.3) - 13:04
50. Exporting - 8:05