When it comes to the Spec Points its really hard to give a good advice.
The choice mostly depends on your ship and the way you want to play.
However, maybe more important than the choice is the way how you spend your earned Spec Points.
It is most important not to spread your spec points across multiple Spec Trees.
Start with one Spec Tree and fill it completely. This way you get the Trait for this Spec Tree and a very focused combination of Spec bonus powers.
Personally I always would start with the Commando Spec Tree.
That one fully focus on ground combat without spreading over to space (like on the other Spec Trees).
It is fast to fill since it only has 15 Spec Points.
Another good reason for that choice is the fact that if you intent to earn Dilithium (which you will need for pretty much everything) ground combat is the fastest and easiest way to earn it.
To focus on Commando certainly will help you to make better progress with your chars.
