Avogadro6: About the X series, balance varies significantly between each game, but generally speaking it's important to have a good ship and equipment before getting into combat, expecially if you are inexperienced.
Ideally you'll want at least an M4 before trying out combat (or even better, an M3 - the Nova Vanguard or Raider is a good start, avoid the standard Nova, too slow) with PACs and max shields, engine and tuning upgrades. Combat software mk I and II will also help a ton with targeting and aiming if you can find them. To get at that point you'll need a lot of money and rep, we're talking about 1-2 millions credits (or, you can search for some abandoned ships to claim) but past that it's going to be much easier. Also you will be able to start capturing ships, wich is one of the most lucrative activities.
If you ever intend to pick up the series again, I recommend starting either with X2 (easier combat and simpler game mechanics) or Terran Conflict wich is a lot more user friendly but is also more complex.
Yuup I gotem all but even the ones that have a fixed story are difficult and right now i'm totally trapped because i have 0 cash and I need things to take out a minefield... so i practically have to restart...