of course, before pvping, u need to get levels, quests
fight demons? start off bandit beating, fighting normal demons, then, challenging part, fighting the 12 lower kizuki, the lower 6, are quests that can be done solo, those enough will get u max level, but, make boss fight quests, like akaza boss fight, lets say u need 3 players for akaza, or like 5 players for douma etc..
this makes the game alot more fun.
upon defeating, u get levels ofcourse ( alot more than lower 6 ) BUT u get accessories, ones that can only be obtained by certain demons. thats it .