Great info above.

Something else to add - in addition to the great skill that was mentioned that you get at Lv. 50, once you hit that level you can also buy artisan gear for seals from your grand company. This makes a HUGE difference.

Gathering HQ materials as mentioned previously can be a really big help, but if you are still struggling, you can do tradecraft levels until you hit 50 and can get the artisan gear. I'd recommend doing the highest level leves that you are able to comfortably craft HQ on, as you get double XP for these. Of course that depends on how many leves you have available.

This is the rotation I use for all 8 crafting classes, who are all level 50+ (I'm still in ARR - as you move on to each xpac the mechanics will change). This is not completely optimal since I build quality first, but with this I am able to craft any Lv. 50 item up to 2 stars with 100% quality even if I get no greats or excellents:

Inner Quiet
Innovation
Waste Not II
Basic Touch
Basic Touch
Basic Touch
Innovation
Basic Touch
Basic Touch
Byregot's Blessing (Obtained at Lv. 50)
Basic Synthesis until progress is done (with my current setup items up to Lv. 50 2 star take no more than 2 basic synthesis to complete)

I have just enough CP to do the above actions and usually have 3-4 moves left. If you don't you can use Hasty Touch, but this is a risk and I instead recommend to update your jewelry. Even the Lv. 40's jewelry items should give you enough CP for this rotation. At Lv. 54 you will get Precise Touch, which you can use in place of Basic Touch to finish the craft even faster as you get greats and excellents.

One final recommendation - try to resist the urge to restore your CP when you see greats and excellents (except after the very 1st move of Inner Quiet, if needed). Using quality actions when this happens is a much better option. Again, keeping your jewelry up should alleviate any CP issues you have.

Happy crafting!