I'd pick stuff that actually interests you to do first.
I've seen so many people grind up all the crafts complaining of boredom, then working through thousands of bods complaining of boredom, just so they can get a runic tool and turn out a set of arms/sleeves to complete their suit. Seems to me that if you're not interested in crafts at all it's a huge waste of time & resources to train them, when you can simply buy what you need when you need it.
I'd begin by exploring the skills you're drawn to, check out how other people have integrated them into their characters, maybe toy with some ideas of your own. There's no wrong way to do stuff, unless you place a lot of value on the opinions of strangers. Some of the best characters I've created came from imagination.
When you get a bit of gold together, buy some soulstone fragments or at least one full soulstone. That way you can toy with different templates without too much concern for if you're heading down the wrong path; you can always change your mind. Keep one character slot free, use it to store all your spare skills as you discard or rethink them. Also you can use a fresh char to train a specific skill then transfer it to where it's needed.
Remember there's no need to rush out and fill every char slot with permanent characters right away. In fact, doing that will probably bore you silly after they're all trained up and you've "done it all".
Take your time, enjoy it.
*edit* Nearly forgot: Try out the Test Shards, you can set skills to whatever you wish there, you have access to the artifacts and runics, basically play around to your heart's content before committing to building a character for real.