Make things that people are interested in looking at. Just because you drew it doesn't mean it's interesting or engaging in any way, and if your only sample is done on notebook paper then I don't understand what kind of response you were looking for.
if you don't want to do figure drawings, or environmental drawings, or anything that is subjective then do interesting abstract work. Use color and form to entice us. I want to see entire page spreads of these pattern drawings, landscapes and scenes that swirl together and vibrate. I don't care about a 2 inch by 2 inch swirlfish unless its in a 30by 20 swirlingocean that is crashing against the boarders of the page, with swirling clouds and seagulls, with the sun and the moon melting into the sky.
So basically, be more invested. People dedicate their entire lives to the pursuit of an audience. They play music on the streets, they paint on walls and they obsessively update their sketchbooks...
In many cases, obviously not all of them: these are the people you want to scout you.
If you show no interest in making engaging art I have no idea why anyone would like to see you churn it into an already crowded arena.