help with learning how level crafters and gatherers

[Raraka]

I would like to build on what Yuella says

GC deliveries are by far the most cost-efficient way, as its usually a high return of exp for a single or a few items, hence why its limited to once a day per Crafter/Gatherer

Ocean fishing will get you to 90 very quickly if you catch the voyages, I would suggest getting started on it since it has few gear requirements, and having at least one high-level gatherer will help you unlock the scrip vendors for cordials and better exp scrolls

When you finish Heavensward you will have 2 more big sources of Exp open up for crafters an gatherers:

If you would like to power level some things, the Firmament is a great option.

One more important tip is using the DoL/DoH exp scrolls that you can get with company seals and scrips. As you reach level 60 with some of them, custom deliveries will also greatly boost your weekly exp/scrips with little effort