New block on “enter”

Hi Helmut,
first thank you for the great plugin! Just taking the first steps and struggling a bit…

I created a block like this: div-html(h2)-Author Rich Text

I can find and use that block in Gutenberg, but I want to automatically create a new paragraph block when I press “CR”, so like the behaviour of the core headline block. My custom block instead creates a new line and stays in my custom block.

I need the “+” icon to exit the block and create an new one. Is there a way to mimic the normal block behaviour concerning “CR” (so build a custom headline block for example which behaves like the core one in the editor)?

Thanks!
Stephan