This guide is probably the most updated and recent guide for returning players but new players can take a look at it.
No, there are no parties at low levels so you will be soloing (with Trust NPC) until lv75~80. Depending on how you play, you can reach this level in about a couple days if you are focused on it. This is when you can level in Abyssea-alliance. You can start playing in Abyssea as Whm as soon as lv60 but I don't recommend any offensive jobs to play with abyssea alliance until lv80+.
Learning the ropes in the lv99 for any job is a long and painful process since you're pretty much thrown into the wind without the shelter of exp parties to teach you. A lot of guides are obsolete on teaching you how to play your job and a fair number of non-obsolete ones assume you have some experience with playing in a party. Having a dedicated mentor or a helpful linkshell is paramount in mastering your 1st job.
I don't recommend a craft until you reach lv99. This is because most crafts are costly to level (for a poor noob) and time consuming.
The best crafting a poor noob can focus and should focus on is cooking. No, it's not going to make you rich but it will provide a steady and modest income if you have a Thf job or level fishing. It's cheap and easy to level and you can make your own food since you will need a lot of food for pretty much everything. You also do not need to reach lv100 to start making something profitable and useful for yourself.
You should dabble in other 'cheap' crafts to make things easier for you once you reach lv99. Again, none of them will make you rich or even close to profitable aside from cooking. Their primary use is to convert loot you get from everyday things into something more profitable and selling.
Race is more or less dependent on HP/MP rather than other stats. They are fairy even now but still there are certain flavor into it if you like Min/Max. In general, Galkas are favored for HP and most of the time they are fairly useful as almost any jobs. Other than that, cosmetics is probably the only reason for race.
Edited, Jul 30th 2014 2:29pm by Oddwaffle