Are there any freelancers out there who might be willing to offer their wisdom to someone who is just starting out?

I’m Lopez, and I recently started marketing myself as a freelance illustrator at conventions and expos. I was approached by a potential client to be considered for their project--nothing that's been established (but exciting nonetheless). We've exchanged a few emails, and I feel like I have mostly everything prepared. I've done a lot of research, but there still sits some anxiety that perhaps an account of firsthand experience would quell.

I know InkBlot may not best platform to pose this question. However I've noticed a handful of freelancers and professionals migrating over, and I'm crossing my fingers that _someone_ might see this.

Right, so my biggest concern is about licensing and distribution rights. Being entry-level I've set my rate at $30/hr. Hypothetically speaking, would I increase the rate itself to account for licensing or charge a percentage fee from an estimated quote/final quote? What are acceptable percentages for varying levels of distribution rights? Alternatively when or where is "work for hire" to be considered?

Any personal accounts, articles, videos, or other resources on the subject would be very appreciated!