After you hit lvl 10 and got to Pand. you can train there. I would waite till you have some cash and mats built up before worrying too much about it.

I think lvl13 for armor and lvl 15 for weapons are the lowest you can make.

Not sure about other crafts.

Both armor and Weapon Smithing after lvl 30ish its about 1k gold for 1-2 points of skill up.

50 points in Weapon Smithing you can make all of the lvl 15 weapons.

lvl 50 or 60 you can make all the lvl 13 armor and some lvl 18 armor.

If you cant find it in Pand. hit your "M" key and read the places names I am 99% sure it has a reference to crafting next to the area you need to go.