"Tradition in such plain text messages is to surround the URL with < and > as kind of quotation marks (as the latter can be problematic too; depends on the algorithm of the URL detector): You can see that in <http://example.com/foo>."
Depending on the company's idea, execution and plans for revenue, absolutely go for it.
You will learn far more being an exec at an early startup than you will sitting in a classroom.