Here's an older sketch of Nelson as a teenager I did last year, looks kinda shoddy because I tried to edit out the back of the paper he was drawn on, you could see paragraphs/words from the other side over the image.
There's a newer episode where he reveals to Marge that he wanted to get into event planning one day, so I imagined him starting out having a rag-tag office and doing small jobs or events. I have a partially colored version of this I'll post in the future.