A few thoughts...

Good!

Not good now! There is no way this is the largest, most urgent point on the board. Lucky for you, Black pretty much wastes

, giving you a chance to redeem yourself. If Black had played something like K4, what would you have done?

Shouldn't this be in the opposite direction? Q13 looks about right to me. We should want Black to invade the top so that we can use the low stone on G17 to attack.

Fun idea but very difficult to put into practice because the top is too wide to seriously threaten Black while the right side is too wide to successfully enclose with one more move. Tapani's idea of M17 looks much more reasonable. With

Black gets behind

anyway.

Slack. N14 instead to continue with the basic idea of enclosing the top? Test Black's response to a White play at L16 first?

Too thin. Note that this play does not really threaten Black's left side so Black can reply aggressively. It is time for White to back up and defend somewhere. Also note how

weakened White's top left group while making Black's top completely safe.

If Black had simply played say R11 to live on the right side, what would you have done?

If Black had played H9, what would you have done? Right now Black should want to avoid anything that closes White's gap at E15. If Black gets to play E15, something must fall.
In the final position on the left side, note that Black can play A8 and capture the upper stones.