Another option is to sublet the flat you are living in? Airbnb is usually offering the ability to rent out only a room from your flat, but you might check the local regulations first. Limit your food/entertainment costs by shopping at discounters.
There are food banks, and even opportunities to buy really cheap food that’s close to its expiration date.
Make a strict budget of how much you are able to spend per week for food, essentials, etc. and try to stick to it.
Try to advertise your artwork, to increase the visibility. Get some part-time job, etc. and good luck mate!