How to select a block after inserting it?

How to select a block after inserting it or in general do selecting programmatically.

This is how i insert a new block:

`this.myEditor.blocks.insert('paragraph', {text: newBlock.text)}, null, this.myEditor.blocks.getBlocksCount());`

This works fine but how do i select now this block so in frontend, the block is marked?

Thanks for any inputs!