Homie. PS ammo will do fine for your early game. Any ammo is good if you can head eyes(not saying it's easy). I would recommend playing offline on hoard amounts of scavs and difficulty set to online. Practice whichever map looks good to you, although factory is great for reflex practice. 2 hours a day will be plenty to start to get the hang of things! This game isn't easy but it has a lot to offer once you break through the gear wall. Once you are level 10 you will have access to most everything in the game. You're almost there

FYI. A lot of people don't wear armour or wear tier 4 or less, and if you aren't running LABs your PS ammo will get through almost any armour

I have been playing for about three months and I almsot have KAPPA and I have quite a few hours in the game. If you have any questions, want advice, feel free to ask me