For placing Skill Points, there are two things to remember.
First, they are dependent on Attribute Points.
For all skills, they can only be one third of an Attribute Point.
Eg: You can only have 3 Riding with 9 Agility.
Secondly, some of them are party-skills, meaning they affect the whole party. The descriptions for the Skills, to find out which ones are party and which ones aren't, are in the top-right corner when you click on the skill. Knowing which skills to invest in, and how they affect the party can greatly help your quest for awesomeness ( for lack of a better term). Also, some skills are best left to companions, as you have done with Jeremus, at least until you start levelling those up much later in the game. Do be warned though, that some companions grate on eachothers nerves. To find out which, there is a list floating around somewhere, detailing the two groups of eight that get along with each other.
Hope that helps.