You can use ground almonds as almond flour. Technically almond flour has some of the oils removed and you can get coconut flour online, health food stores, some of the bigger supermarkets also sell it.
I suppose it all depends if you want to get into low carb baking. I tried the courgette and sppke muffins today but the trick with coconut flour is that absorbs loads of liquid so I think I put a bit too much in as the mixture was a bit dry and not sticky. Therefore you may find that you will have to adapt the receipes when cooking with these ingredients i definitely didn’t need 150g of coconut flour today.
Its also much cheaper to make your own almond and coconut milk as well.