You can obtain Rad token from a number of sources, including but not limited to the following places. None of these sources are endorsed by the Radicle project.
When will Rad be listed on my preferred exchange?
For legal reasons Radicle team cannot apply for / encourage listings. If you're interested in a listing on a specific exchange, you can ask the exchange yourself. Trading on other exchanges also increases the overall order volume and makes the token listing more likely in new places.