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.
Personally, having a higher sensitivity is an advantage. I can easily do 180s if I have to. I also already built the muscle memory to not overshoot when doing 180s. I suck at taps tho. I dont really move my mouse too much since I dont have a lot of space on my desk too, so having a higher sens can help you if you dont have a lot of room to make adjustments/have a small mousepad Anyways, if there are people who dont have these 2 problems and still play with lower sens, why?