How to make blocks in minecraft
By dismantling them. You can craft other blocks from mined blocks. If you click on the green book in the inventory or in the workbench, you will see what you can craft from it.
It always depends on which block and which version you have.
The easiest way is in creative mode there you can go to the three dots at the bottom of the display (I have Java so I don't know if it is the same with the others)
The workbench can also help you.
On the PC / laptop you can use the key combination Windows + L
Windows + L opens the Windows login screen.
Right click.