I had a feeling that I was trailing behind by a fair bit, but a few minutes passed and I won on time. (I still don't know how to extract SGFs of my games to upload here.)
https://online-go.com/game/1975045

Hi Tekesta.

to post a SGF file, you need only to click on "sgf" above the text box and copy the URL of the sgf file (usually the download sgf button).

Hi Tekesta,

Strange. W ignored . Can you find a better local move ?

You're just following your opponent.
Again, W ignored your move, !
When will you follow up with your moves ??

Same. You're just following W.

Still just following W.

You're not paying attention to what's happening on the board.
W's upper right group is not yet settled,
but you must take the vital point to keep it weak:
if you block at S18, W is not alive.
But if you let W hane S17 and atari Q17, W is almost alive.

Another idea is to close W with o14.

W jumps out.

This shape is not very good.
Maybe Q13 kosumi or Q12 keima better.

Very soft. Find a better local move.
( Same feeling as , , , --
you are not severe enough. Just following W. )

The softness continues. Find a better sequence.
You're not thinking, "What's the most severe move here ?"

Same problem. Again, W ignored your --
when will you follow up with your moves ??

Standard bad habit: push & nothing. Cut at Q6!
"Push and cut", not "push and tenuki".

Finally, you follow up.

That softness again. Sad.
Find a better local move.

Whether you won or lost on time is not so interesting.
Look at the quality of your moves.

As you can see from your moves up to here,
they are frequently soft -- you don't look at the situation
and try to find the most severe move.
You don't follow up; you often just follow W.
That's no way to play Go.

You come to the board to Fight !
Not to yield. Think about it.

All that follows are preliminary comments.

For this one I am guessing L3 or P3 would've been better. Allowing White to have big areas is one of my current weaknesses as a Go player.

Soon enough.

I have yet to develop kiai. could've been better at D15 to prevent formation of a White enclosure but then my Black group at the bottom would get squeezed real good. I would then have to find a gain to make up for that loss.

would have been better at K17, I think.

Would @ N18, @ S18, then @ O16 have done any damage to the White group in the upper right? I got a bit fearful and did not attack right away.

I like q12 better.

This is what happens when one's Go skills get really rusty. Hmm. How about @ E16?

From here we can say that I made too many lukewarm moves. I will need to play a bit more before coming back to L19 with another game to analyze.

Hi Tekesta,No, very local to .That's possibkle, but that's not the issue here.
The problem here is with local, contact fights.

Hi Tekesta,No, not soon enough at all. That was a rhetorical question.
Developing kiai is good, but you're still missing the follow-up move for .
Not D15 -- look at the local situation of .

Hi Tekesta,Yes.

??? E16 has nothing to do with the local fight.
Local to ! Very, very local!