Good morning year 12
by now you should have a great idea of what you are looking to design.
The next stage is to outline a draft of what your design will look like before you build it.
Have you ever considered doing this on google docs. If you have or have not click here to find out what its capable of.
The link here will take you to the spreadsheet that I built for Pennyblacks. Clearly yours needs to have a similar purpose and be designed for a specific audience in mind.
Good luck and well done