where to find holosFollow

hey i play on the tempest server im a master scout//marksman and have 0040 bh , 0302 pistoleer and novice medic (stims so i can solo easier), ok i have been playing under a month and need to know where i can go to find holos, i have no idea where to find them and i would much rather solo and find them on my own instead of group and have to argue over who gets the drops, i also would like to know if i EVEN COULD solo whatever i need to kill to get some holos =), ty and plz post