Here on WOD, you'll find there's nothing really in short supply. All of the skills are basically covered most of the time. In fact, many players use their 5 character slots to get crafters of every sort as well as 3-4 hunting characters.
That said, some very important skills for a mage (since I read your other posts already) are the obvious Magery, Invocation (called Evaluating Intelligence on the character creation screen), Healing, and Anatomy. Healing and Anatomy work basically on their own here. There's an options screen where you can decide when and how to heal yourself automatically (.options). Give it a look; it works great if your Healing and Anatomy are at least 60.
Also notice that there's a pretty wide array of weapons available to mages. There's at least one wepon from each of the swords, fencing, and macing groups that you can weild while casting spells. Take a look at the manual. There's a wealth of information there for new players.
OH and BTW, welcome to WOD