Ninja'd by my own propagandaYou can do pretty much anything you want, first think about what you like most (trading, mining, missions, combat, exploration), then we can point you to some guides and give tips.
Mining is probably most profitable and it's actually fun. You can't do deep core mining in your T6 though, you would need to support the small seismic charges foundation and help convincing FDEV that our leader @Kenneth Mcgrew is right. So in the meantime I would suggest to trade your T6 for an Asp Explorer or something like that.
for more information please click on the Small Seismic Charge Foundation link here