I don’t like my voice but hopefully this helps.

You have a clear pronunciation and a nice sounding voice. To obtain an American accent you need listen to words spoken in that accent and repeat them, again and again, until you get a feel for the rhythm and stress point. To do this you can use Google translate and press the speaker symbol after you type in the words you want to hear spoken. To get an American sounding voice you should use www.google.as (not google.com) Hope that helps.

Mostly pretty good, It's noticeable that you have an accent (i.e. not American), but perfectly understandable. I'll try to post a recording of myself reading is a fairly standard American accent., if you want to listen and compare. Hope it works.

It sounds good. Don't be too discouraged about the "r" sound, the American "r" is incredibly difficult to learn to pronounce. Keep it up!

Very good! Try to hit the “r” sound in “for” a little more strong, but your pronunciation was very good.