My friend, you can be as stereotyical as you like, as long as your background doesn't conflict with the setting.
Upgrading your stats and skills is possible, but don't expect it to be easy. If you spend considerable time practicing one thing or the other, your skills in this area will gradually improve. But to get a secondary skill (a skill that is not a part of the original build) at the level of a primary, you'll probably have to re-enroll at the Academy on New Terra, and that would take you out of the game for a few years.
These things are difficult for a reason, since I don't want a large group of 'generalists' running around. Making choices and specialising are important parts of the game. When faced with the limitations of your character, you can always call upon the NPC's. Luckily, raising all your stats will be somewhat easier.
On another note, we'll launch the plot when there are four characters ready to go. Until that time, you're free to have your characters explore the ship. The main thread has already been posted.
Naturally, it'll be possible for other people to join up at virtually any time. Also, be adviced to keep an eye on your PM-box during the game. I'll send you information that comes in at your 'terminal'. Don't worry if you miss something, if the information is plot critical, I'll have on of your less competent NPC underlings mention it. Although they will never preform quite as well as a human player with the same profession and rank.