In case the IPA symbols don't mean much to you, see if this helps.
The first syllable jI- is pronounced like "jib" without the "b", like "jill" with the "ll", and like "Jim" without the "m".
The second syllable is pronounced like "yacht", but removing the "cht" and replacing it with the sound at the beginning and end of "judge": jI-yaj
But "dodge" makes a great rhyme for yaj.
You'll note that the context was "a non-rhotic speaker from southern England" -- those don't have the bother/father merger, at least to my knowledge.
yaj has the vowel of "father" but not the vowel of "bother", for those for whom those two vowel sounds are separate.
So "dodge" might work for you, but it does not work for all English speakers, and in particular not for (most?) people from the UK.
It's a typical feature of many US accents.
I'm confused as to what you are referring to as "this" and what you are referring to as "here".
I'm going to assume you mean, "this conversation" and "this forum thread". If I have misjudged, feel free to explain more and we'll try to answer better.
Every sentence in Duolingo has a discussion thread in the forums. If you have a question about that particular sentence or want to comment on it in some way, you can come to the discussion thread and post your question or comment there. This particular thread is for the example sentence jIyaj used in this course. The other posts here are (at least theoretically) about that sentence.