When you select a race and class you need to ensure that you choose one that suits your play syle and the weapons you want to use. If you want to use bows or melee weapons then your selection should be based on stamina and if you want to use staves then it should be on magicka. Any class can be stamina or magicka based but if you try to mix the two attributes you will weaken them both and end up becoming weaker and weaker vs NPC's as you level up instead of becoming stronger.