Make sure you are connecting with our game launcher, otherwise you will suffer serious disadvantages (missing skill points, missing feats).
About Skills
See Skills.
Feats
See Feats.
Abilities modifiers not covered by the core races
If you intend to play a custom Subrace, you will in all likelyhood receive custom ability modifiers. We bake these modifiers into your character file (as opposed to providing them as effects). A DM will help you with this after character creation.