Otherwise you're just playing, excuse my french, crap go.

If you post crap, I mean blitz, games for review, some kind folks may do it for you, but then one wonders what's the point, and who really benefits from it.

As soon as W jumps into your narrow gap, W is already pincered.
So you can play R14(A), but, it feels a little redundant, inefficient.
(W is already pincered; why spend another move to pincer it 'more'.)
You can consider o16. You can tenuki.
This is not so important. The opening is quite flexible.
The game is decided later, not here.

The extend up, A, Q9, is not slow -- it's a very good move.
Your jump allows W to hane under at S9 -- you cannot resist at S8.
Compare: if you extend to Q9 on , then if hanes at S8,
you can resist and hane-block at S7 -- but with your jump, you cannot.

This jump mistake is more important than your question about .

In this case, either tiger's mouth ( Q8, Q10 ) is out, because you allow B atari at R9.

That leaves only Q9 solid connect (having to do with ladders),
or, S9 push through (also requires more reading).

Misunderstandings here:

• Your lower right area is not exactly thickness.
  It still has weakness; W still has aji there.
• M3(A) is NOT too near to your lower right corner.
  M3(A) is a good extension for you.
• If you block with at M3(A), then W is very cramped.
• With your real at H3, W makes a nice 2-space extension to N3.
• Your real at H3 is too close to your lower left stones; you are cramped.
• If at M3(A), and if at H3, then happily takes 3-3 at C3.

Sometimes our thinking -- the situation with --
is the exact opposite of the reality ( like ).

You're correct that fixing the lower right corner is too small; tenuki is good.
However, locally, your R3 is not the right shape. You want the tiger's mouth S3.
Can you think of one reason S3 is better than R3 ?

Bad basics; misunderstanding. Just block with at C10.

Ponder: