Added three restrictions to Competitive Matchmaking:
— If a player does not have a competitive Skill Group, they will not be able to queue in a party with a player having a very high Skill Group
— Accounts are restricted to two Competitive wins per day until they receive their competitive Skill Group
— Unless they are in a party of 5, players will not be able to queue for Competitive Matchmaking if their skill group range is very large.
The middle part is most relevant to you as a new player here. Note that it says 2 wins.
This only applies to matchmaking, you can still play everything else in the game. This includes, but is not limited to, deathmatchs, arms race, gun game, casual, community servers, and playing against bots.