I'm not good with computers either (especially where the brave new world of Androids is concerned) but if you don't have WiFi at home perhaps you could visit a local cafe, library, or other establishment that does and downloading the game while there? I think that should work.
Also, for some reason I can't find the specifications for your Q-Media Android 2.3 tablet; are you sure your device has a sufficient resolution? ( here are the required specs: http://tinyurl.com/Amanita-Design-blog )
Hope this helps.
I am in the same situation. I cannot go to the library because our local library doesn't have wifi (only wired) and there aren't any other libraries within 50 miles of where I live. Are there any other solutions for me?