You are restricted to in-system flights unless you by the JumpDrive.
0) install my "Pods patch"
1) sell Cargo expantion, by 10 dumbfire missiles, and probably another laser
2) trade commodities between bases in Troy, it's possible to earn 1-2k per trip
3) by Afterburner, Engine Upgrade, ASAP
4) avoid fights, if you can't go to heads-on attack with guns+dumbfires
5) buy JumpDrive eventually, go to New Detroit and surrounding systems