I am so confused. Can someone tell me what order I should watch the triangle series with all the other series related?

You should start watching season one first.
You will really enjoy it and you will also be caught up on everything

I actually need someone to order the series for me so like the first series to watch then the 2nd and so on

I think this is such a valid question, I'm confused as well with all of the new content.
Triangle season 1
the three siders
Triangle season 2
the three siders season 2
davenport diaries
dark horse
triangle season 3
after season 3 I am confused