i guess i should start my official duties as part of the alliance by translating this thread
My advice is to start with the topics which appear at "In Progress" section. TalkImg topic is still there, but it's considered as done, because it reached at least 10 translations. We consider a topic as done after it reaches 10 translations.
So the one with priority are the ones which have under 10 translations, in order to obtain 10 translations for which of them, thus to complete the work on them

Of course, it is only up to you about what to translate... If you translate all the topics which appear at "In Progress" section, you can also pick some which are listed at "Finished" section but which do not have Arabic translations yet (and there are many of them there.
But picking what topic to translate it's up to the translators, all I wrote above is just a small adivce and an attempt to help you understand when we consider a topic as done.
i looked at other translations to see how i should format it, so just to make sure, i should put the author and original thread link at the top, the translated content in the middle, and a link to the alliance at the bottom, right?
Yes, this is correct.
@Porfirii my two translations on the LoyceV's topic
Great job again, dear cygan! I announced LV as well about your translations and I am sure he will be very pleased
