Hello I have 3 hours on dota 2

Hi,


I have played for 3 hours haven’t played in a while and want to play again but want to know
How do you get items?And where do you find items prices?

Please help.

I didn't find the right solution from the Internet.

References:
 steamcommunity.com/app/570/discussions/0/1696040635921436164/
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Thanks