Play games
Choose the game that interests you and play itfor free.
Complete the quests
Every game has some quests for which you will receive Soul Gems.
Receive rewards
You can exchange your Soul Gems for Steam Wallet top-ups, game keys, CS:GO Skins and other rewards.
My old account had about 6,000 battles, but I couldn't realistically play past tier 4. The level of difficulty goes to 11. A training mode would be really helpful at tier 4 or 5 to understand the mechanics. Also, MM goes completely bonkers. My KV-85 always got scout MM and was always bottom tier against tier 8's and 9's. There really needs to be an option for single-tier games or an off-line single-player training mode to teach techniques for each tank.