Τρώω sounds like the sound your throat makes when you swallow. That's how i remember the word.
Do double vowels(may be incorrect term for them) like in 'τρώω' get elongated like in Japanese or are they independent sounds because of the accent?
I can't comment on the Japanese which I am not familiar with. I'd say your conjecture that "they are independent sounds because of the accent" is accurate.
Here are two sites with pronunciation.
https://forvo.com/search/%CF%84%CF%81%CF%8E%CF%89/ This has native speakers. (Careful there is also Ancient Greek which you don't want here.)
http://www.oddcast.com/home/demos/tts/tts_example.php This is a TTS rather like the one we use.
I should point out that the normal speed pronunciation shown with this sentence is correct but at slow speed, it is really odd.
Do you mean you don't have the Greek keyboard yet?
HOW TO GET THE GREEK KEYBOARD These links will not only show you how to get the Greek keyboard but also how to find the Greek letters on it, how to add accents etc.
https://www.duolingo.com/comment/22040507 It will also help you learn the alphabet and where to find other
THE GREEK ALPHABET https://www.duolingo.com/comment/22424028
And here is another to help you navigate Duolingo
FAQ - General Questions, Bugs & Reports https://www.duolingo.com/comment/23799672
Some simple hints to get you started:
Always read the comments before posting.
Read the Tips & notes right below the list of lessons on your Homepage
Read the drop down hints. Pass your cursor over a word and a list of words will appear.
These are the official Duolingo guidelines which you should read. https://www.duolingo.com/guidelines And these will answer lots of questions about how Duo works. https://www.duolingo.com/comment/8000024
If you have questions just ask.
Εγώ means Ι and needs the form of the verb for I which is : "τρωώ". The verb form τρώει is for the "he/she/it" form.
It’s like the difference between “I is eating the bread” and “I am eating the bread”.
Εγώ τρώει/I is eating is simply incorrect: the verb does not match the subject.