Kung nakasave ang account mo, open mo lang yung steam tapos offline mode. Click dota 2 > play > play anyway. Play dota > play vs bots > select solo then start
Kung hindi, punta ka sa install location ng dota, usually nasa C:\Program Files (x86)\Steam\steamapps\common\dota 2 beta\game\bin\win64\dota2.exe tapos same steps na after ng play dota.