There are a lot of things to juggle.

-- money to buy a skillbook (or you need to find the skillbook)
-- memory slots to cast the skill
-- action points
-- source points - available but you need to find items or notice areas where they are available


It is very easy to do something wrong - especially for a new player (or even for a player who has played thrpugh D:OS1). E.g., you might buy a skillbook and not notice that you don't have enough memory slots (or some other resource) to use it. I understand the need to balance things, but the current system is a little cumbersome. It is probably worth thinking about how to streamline it. It reminds me a little bit of having to juggle headcount, money etc. for a large project. I typically play a game to forget about that crap for a while.