Well, you will see a lot of this arguing who has bigger SI and who killed who and when and what they looted etc... Read the forum, but avoid bulls***.
Get good mentor in your time zone.
Useful web site - entropedia. You can study every mob there, every gun, every armor, anything that exist ingame you can find info there. Read a lot of entropedia before you flood mentor with beginner comments. Trust me, there are really really polite people there, but maybe they don`t type that fast, maybe they wanna hunt or mine, and your question after question on what is what might not help.
Begin with going to Arkadia. Take the IFN mission chain - carabok, gallard. Both mobs have 10-15 hit points and are easy to kill. They give carabok hide that you sell to other people for increased value (Mark up-MU) and gallard hide. Both of those loot items will push you into breaking even, maybe even into positive.
Before you go hunting, buy S.I. Scorpion. Very economical gun. Mostly people sell it for TT price +1 ped.
Hunt those two mobs. If you get low on PED, start sweating carabok and then killing it. It is very slow process, but will keep you playing for free. Don`t buy armor, don`t buy fancy guns, don`t read globals, HoFs, ATHs etc... Maybe start shooting mobs from first person, i do that all the time, much more personal
Your inventory should only have 1 gun, one type of ammo, don`t do blp and laser, choose from the beginning which one you like. I do laser, because it has cheaper unlimited-repairable amplifiers for beginning. Most importantly, try not to rush the game. Try to sell everything to other people. Just buy from TT, don`t sell to tt anything, if you can do that. EVen tt+10 pec is a great deal. Always look for market value, month-day percentages.
There is so much to write down, just play and chat with people, there are some really polite people out there. But there are others, watch out for them. If you put your loot to trade with other avatar, and he/she puts ped in less than 10 seconds, that mostly mean they are short handing you, giving you less money. Take your time, calculate MU!
BEst of luck and have a good time