What does "gave him a helping paw" mean?

Who pushed a marmalade baguette into a tube?

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"I'm glad you're back, Mr. Brown," said Paddington. "I've found something."
He held up a reel of film marked TOP SECRET.
"Brilliant!" said Henry. "Let's put all the canisters back and get out of here."
Paddington gave him a helping paw, but Henry was in such a hurry, he pushed Mrs.Bird's marmalade baguette into one of the tubes by mistake.
There was a strange gurgling noise as it was sucked into the system.
"Mr. Brown?" said Paddington. "I think my baguette went down the wrong hole."


I don't understand this sentence a bit.
( Paddington gave him a helping paw, but Henry was in such a hurry, he pushed Mrs.Bird's marmalade baguette into one of the tubes by mistake.)

I looked up "give someone helping hand". I learned that it means "help, support,assist".
I thought Henry put a baguette into a tube.
But I found my misunderstanding after reading next sentence.

I think a sentence with commas is difficult.

I will understand if it writes like this.
Henry was in such a hurry.
Paddington gave him a helping paw and pushed Mrs. Bird's.......

How should I learn a comma?

Sorry, I changed my question...