If you are just starting out in Starcraft 2 then you might consider reading a good Starcraft 2 strategy guide. The game is all about speed, strategy, and just knowing the basics of the game. Shokz Guide is a great guide to learn from as it covers the basics like the unit counters and more advanced stuff like increasing your actions per minute.
Starcraft 2 Strategy Guide
You should start out going through each race which include the Protoss, Terran, and Zerg. Each has their own style of play and own Starcraft 2 strategy guide. Protoss is known for their powerful units. Zerg can mass up lots of cheap units quickly. Terran is kind of in between and is more tactical.
After picking your race you should go through a good Starcraft 2 strategy guide like Shokz Guide. Learn the basic stuff like what units do well againt other units. For example Terran Marines do well against Zerglings but will get crushed by Banelings.
It is essential to know about these basic Starcraft 2 strategies. No race is the best one out of the three. Each has its own pros and cons. The Zerg has their own turf known as creep which they can spread using Queens to spawn tumors.
You should look into a solid Starcraft 2 guide to get all of this stuff down. The Terran has their basic strategy of going for an amy of Marines and Marauders which is a strong build but certainly has their enemies.
With this Starcraft 2 Terran strategy the last units you want to see are Siege Tanks, Colossi, or Banelings. Bare in mind that it is not so much about what Starcraft 2 strategy you use but how you use it.
That is why I recommend practicing a basic Starcraft 2 strategy of your race and master it. Having a Starcraft 2 guide by your side is also a great idea because then you have something to refer to. Be sure it was made by a good Starcraft 2 player such as Shokz.
A basic strategy for the Protoss includes the 3 Gateway Robo tech. Just because it is an early tech does not make it too advanced for a newbie to handle. The cool thing about this Starcraft 2 strategy is that you get an early Observer out to spy on your opponent and watch their every move. Then act accordingly.
Starcraft 2 Strategy
The Zerg has their basic strategy of going for early Roaches. This is ideal against an opponent that is not going for early air. Check out Shokz Guide for more tips and advice.
Starcraft 2 Zerg players should learn about the unique skills they have such as burrowing units and spreading their creep. This can be very helpful in game. Just be sure to always have a good idea of what Starcraft 2 strategy your opponent is going for so you can counter it with your own strategy.
This is what the Starcraft 2 game is all about. Keep learning from strategy guides like Shokz Guide to really improve your skill. It is a great Starcraft 2 guide to start out with.