improving your players is 2 fold: getting cards from experience, and using the boost slots and attribute boosts.
as far as player cards, you need a combination of games played and good grades. your games and grades online are totally seperate from offline. you can play BAP till your hearts content. it wont effect your eashl stats. each card you get gives you more XP to upgrade attributes.
in addition to this, there is upgrades attached to equipment. last year, it was the equipment itself that help boost slots. this year they are independent. but you still need to unlock each slot associated with each piece of equipment. at the bottom of this link is the various tasks needs to unlock each slot:
http://www.operation...115&postcount=1
once you have slots open, you need to put boosts there. there are 3 boosts for every attribute: +1, +3, and +5. for each of the boosts there is another task associated with unlocking it. here is a post that tells how to unlock all the +3 and +5 boosts:
http://www.operation...116&postcount=2
in addition to the various tasks, each boost slot and boost can be purchased from the psn store. lots of people just spend the money to get what they need. you can also do a combination both. buy some and earn some.
in addition, there are boost packs. they are player type specific. if you equip a boost pack, then you cannot use XP and individual boosts. it is an either/or situation. however, the boost packs can be a good step early on before you have earned cards and unlocked the multitude of individual boosts.
my advice? if you are new to online play it might be worth it to buy a boost pack. then you can be ahead of the game for a while. then you can work on earning your cards and earning boosts. then you can switch over after a month or so and be better off. if you want to earn the boosts, the best way to earn a ton of them is start an offline BAP career. many of the boosts require BAP success. they also require you play 40 games of the season to prevent simming the whole thing. the best way to do it is to put it way down on rookie and boost all the settings of human skills. then sim individual games and play only the 3rd period or last 5 minutes and get several points. i just finished the first regular season BAP and have 4 slots, 7 +5's, and 11 +3's unlocked so far. in my season i ended up with like 120 goals and 180 points. thats what i mean by super easy difficulty!
i know this has been long, but it seems like several of you are totally new to this, so i started at the most basic level.