My name is El and I'm an illustrator and animator graduate- although I can't tell you what exactly to base your project on, I thought I would tell you about a warm up I learnt in Uni which really helped me!
Simply make a spider diagram and list a handful of things you like, for example, animals, plants, a certain book, a movie, cars, make up, food etc.
Now, see what you could make out of these choices if you merge them together- so, if you merge plants and animals, you could make different creatures inspired by plants and simply merge greenery with your favourite animals! Then try and find artists who relate to this art form, such as Hiroki Takeda and Km Steere. Then from there you find artists you like and inspire you and develop your little idea into something huge!
During the diagram you can continue on with details and certain parts of the first subjects that you like- so back to animals and plants, you could look into natural decay, skeletons, the biology of the plants, shapes and sizes of nature, natural art, different plants such as poisonous plants or medicinal plants, natural products such as meat consumption and how we eat vegetables too, natural dyeing, natural printing, creating characters or world designs or simply just new creatures.
You can look up different art techniques and artists who use animals and plants as their inspirations as they're always inspirational and you'll always find something new. Maybe even looking at different cultures and how they use plants and animals for medicine and etc. Moodboards help with this too.
This can work for any topic or idea that you have so I'd highly advise this technique!
Hope it helps,