I am a beginner I don’t know if it told how to play but I normally pick things up so I’m stuck..

I am a beginner I don’t know if it told how to play but I normally pick things up so I’m stuck at the first drive trying to work out how to make a MALLET, I can get to the next bit if I get this, Also with the numbers 9 is the highest you can merge so what do I do with my 9, s? Can I sell them? Any help will be great Thanks JAQX