An aspect of this cake I had a lot of fun with was decorating it. The most challenging aspect of decorating cakes is possibly achieving even layers and outlook. While the video I attached might not be as helpful as a physical tutorial, I hope it gives a good idea nonetheless.
For a start, you will need to ensure the same amount of frosting is used for each layer. Then, always give an extra check to minimize air bubbles between your frostings (air bubbles contribute to a weak structure). Finally, make sure you have the appropriate tools to even out the exterior of the cake!
With that, your cake is complete and you can go big with the final touches!