And usually Eravate or LHS 3447 if you choose the non-horizons start.
Two problems with that, though:
- the Horizons starter sidey has a SRV, so little to no cargo space (i.e. 2 tons at the most, while the other got a 4 ton rack).
- even with the non-Horizons starter sidey, trading on your own account will barely cover the fuel and maintenance cost. You'll need at the very least a T-6 (or perhaps a Cobra) to run anything resembling a profit.
If you want to make some cash at the start, fly small cargo missions. I just started a second CMDR yesterday (PC Commander Deluxe edition currently at 42% discount

), and could get a couple of ~100 kCr delivery missions right off the start.
I wouldn't recommend it for a first time pilot (you'll miss out a lot of gameplay), but if you want to make money fast without combat, there's an
exploration receipe over here. If you don't like exploring, though, it'll be two weeks (one week to get the ship ready, one week for the actual trip) of senseless grind without any intermediate payouts.