Now I will help you choose a Vocation. Don’t worry, they are a lot more fun in Middle-Earth than real life, and the last thing I want to do is remind myself of my old guidance councilors. First, pick the kind of thing you want to make.
If it is Heavy Armour, Jewelry (including Radiance Tokens), or Potions (including dyes, oils and so on), you’re done. Each of those Professions (Metal Smith, Jeweller, and Scholar) only appear in one Vocation, so choose Armourer, Tinker, or Historian respectively.
A note on being an Armorer/Metalsmith: most Metalsmith recipes require components made by Tailors. Armorer includes the Tailor Profession, which helps, but you still need to find a Forester to turn hides into leather for you.
If you want to make bows, staffs, and spears, your best choice is Woodsman. That way you get Forester (to gather wood) and Woodworker (to use it). You also get Farmer, which you can use to get stuff that Cooks need to make food. Armsman also gets Woodworker, but you will need to get your wood from someone else.
The Armsman is the best choice for making swords, axes, and such. In addition to Forester, he gets Prospector and Weaponsmith, so he can get his own metal to make weapons. Note that some metal weapons need wood bits made by a Woodworker, and some wood ones need metal bits from a Weaponsmith.
You may have noticed that all of the Vocations have one Profession that doesn’t pair up with another one. That encourages you to trade with players or use the Auction House, or at least make some alts. The exception here is the Historian. Since Scholar is self-sufficient, the other two Professions, Weaponsmith and Farmer, both require outside help.
The Tailor Profession make medium and light armour, and like Weaponsmith, Woodworker, and Cook, is a Production Profession that appears in several Vocations. Also like those, there is one Vocation that does it best. If you want to focus on Light and Medium Armour, be an Explorer. In addition to having Forester to boil leather for Tailoring, you can gather and prepare wood and metal (the Explorer’s third profession is Prospecting) for use by alts or trade and sale.
That leaves the Yeoman, who can grow and cook food on their own, and can Tailor. It may seem unglamorous, but food buffs are crucial to success when the going gets tough.