you could do the machine learning tutorial, which is now open (was only for pro). The neural networks section identifies hand written digits: same principles, easier start than dogs!
I would do the data science tutorial before: there is some overlap.
You will need large number images and also the label associated with it...you might have to annotate the images labels manually to create the data set....once you have the labelled data set you can train the neural network model like CNN, RNN ...which can output the image label based on the image correctly
