Hello to all gatherers and crafters. I have a few questions and would really appreciate some help working out the answers (btw I cannot post in other forums yet )

1] what is the simplest order to start gathering and crafting to save money while leveling all DoL and DoH up? (it looks so interlinked as to be major confusing)

2] Looks like level 15 cross class skills are very important so is it better to spend gil power leveling all crafts to 15 before swapping to becoming self sufficient?

3] Is there a good website showing marketplace trends that I can browse when I don't have access to the game? (like during break-times at work)

Any other good advice you are willing to share will be greatly appreciated.

Thank you for reading