IMHO, don't buy stocks. You might get a Personal Residence (PR) which may earn you 1--2k or so per month, or a ship like a cloakshape/H, if you need a personal ship where you wil be SAFE.
Otherwise, hire NPCs, and try and get the ones people want to buy (attractive females of the species are a good bet), then sell for 1k to 5k profit. If you have a ship and time, you can offer delivery --- which may swing the deals in your favour. YMMV.
There is no god but Ara... All will walk his path... The Faithful of Ara <--- (Warning: music link)