When you're in light tanks you get matched against much higher tiers and expected to scout. It's well worth reading the wiki on the main site to understand spotting, penetration and matching mechanics. They aren't remotely intuitive.
You can also download various mods that show enemy armour values and weakspots. Grabbing a month of premium(£8) will greatly speed up your grind too.
KIA2 is still recruiting if you're planning on stick it out, you'll have advice and people to platoon with then. with http://www.kia-clan.info/forums/foru...s-Public-forum Just read the stickies before signing up and Use Dunno1 as a reference.