Also have a look at:
https://liquipedia.net/starcraft/Portal:StarCraft
Check out what the units do, as for each unit a strategy is described:
https://liquipedia.net/starcraft/Units
Check out what the buildings do, for some also a strategy is described, I think for defensive buildings:
https://liquipedia.net/starcraft/Buildings
Since you’re at the beginning, it would help a lot to learn about sim city, as it will make it more difficult for the enemy to kill you:
https://liquipedia.net/starcraft/Sim-City
, and unit and building sizes, which will help with building a sim city:
https://liquipedia.net/starcraft/List_of_Unit_and_Building_Sizes
This one is helpful too for learning about the intricacies of the game:
https://tl.net/forum/bw-strategy/220903-simple-questions-simple-answers
If you want to search anything on that page, don’t use tl.net search, as it’s broken, you should use google instead and type in exactly this:
marine site:https://tl.net/forum/bw-strategy/220903-simple-questions-simple-answers
You can replace marine with any word of group of words.
Although, google won’t show all the results, but’s definintely better than what tl.net search offers.