When the play breaks down, take the loss and live to fight the next down or the next drive - don't force things and give up the takeaway. Both those turnovers were on broken plays where Retzlaff tried to do too much...and both in our first drives of the half.
I believe he will learn with more live-game experience.
The second INT was fluke territory.
3-and-outs happen. But, I place the *string* of 3-and-outs in the 1st half mostly on play calling. 5 straight series without a first down...65% of plays called during that string were handoffs.