Lance mains! How do people in YT videos block SO fast with lance DURING their combo?

I have been trying it like O>O>RT but it takes a fair while before my block comes out and I get hit.

I see some people in YT videos saying you can animation cancel into a block? How do you do that?

I get so jealous when I see some guy on YT be doing a combo and he blocks DURING that combo, how?

For me my blocks take forever... (at least long enough for me to get hit)

Any tips?

Also: off-topic, but: sometimes my character will take a near miss? Or a small hit? And i just kinda fumble a bit... im on my 2 feet but like...dazed? just wobbling around? How do you deal with this, why does it happen and how do you prevent it?