There are many topics here opened by beginners so with a search you should find some answers.
Like this one
I advise you to play with players of a same level to accumulate more experience of the game. Use the custom game settings for reaching them.
Automatch may give you some more crushing experience at first unless your level is already established with your bots games.
Patience is key for progress. You will need to wait a bit to understand more on the strategy and tactics (some opponents may try to teach you more but if it is over your head, you can just skip their advices)
Warm welcome playing humans.