To learn Cebuano, you really need a teacher because grammar is just not found online or in books. Plus, it is not primarily a written language it is a spoken language. It is evolving and every place that speaks it speaks differently. However, there are some resources online that can help with homework etc. These are the ones I have found helpful.
a youtube vocabulary builder
English/Cebuano dictionary online
This site is awesome for drilling yourself in anything. You can type in your own questions or vocab or anything. I highly recommend it. You can also search 'Cebuano' and copy other people's lists;
This blog I have not looked at much but it could be helpful;
Hope it helps!