Once you work your way up to being able to do long-distance rare commodity trade routes or high-playing combat missions, you'll have a lot more cash. Really, the valuable part of gamma was learning the skills rather than any particular material gain. There are a lot more NPC anacondas than there are player ones. You're not nearly as far behind as you feel.
And there were a ton of bugs in gamma that they fixed, some of which shut down trading profits for a couple of days. So you missed the bad stuff too.
My standard advice:
Start by doing cargo hauling missions, they pay well and are low-risk. It also gradually lets you learn local trading routes.
Map your discovery scanner to a firing group (press "4" for the systems panel) and scan unexplored systems as you pass through. You can make a lot of extra cash this way on your trading runs.
If you want to keep trading, buy a Hauler or an Adder and invest in more cargo space and better range. For combat, get an Eagle and upgrade the power plant.
Keep enough cash on hand to cover your insurance replacement cost.
If you started at LHS 3447, invest in a longer jump range and travel closer to Sol. The neighborhood is a little tricky to make money in when you're starting out, you'll find a better mix of planets once you can travel further.
Once you feel confident in traveling long distances, go to Altair, Eranin, Lave, or one of the other systems that have rare commodities, buy some, travel at least 150ly and sell it.