I am retired now. I was a professional illustrator and 2D designer for more than 30 years. Hi end promotions, retail merchandise lines, and advertising. I started working in the era before computers, and finished my career as a master teacher of advanced Photoshop techniques. I've helped dozens of first year art professionals learn what they really needed to have a successful art career.
I've seen the portfolios of hundreds of working professionals over the years. Most of them thought their work was terrible... even the really talented ones. But, every now and then, there was someone... who's special skill with a pencil was so breathtaking... that even they knew it was something out of the ordinary.
I know.... I KNOW- what an amazing talent you have as an illustrator. You may be young, you may be still developing the full range of skills you will eventually have... you may not yet know the ten thousand tricks that all professional illustrators use to keep doing their best work when they have five times the work they should have, and a deadline is looming.... but still... I KNOW how good you really are.