Radio Garden is a great resource that shows where radio stations are in the world and provides links to them.
However, it doesn’t tell you what radio shows emerging artists are likely to get airplay on, these need to be tracked down. You need to do some research. If a station only has shows that play music from the mainstream charts or hits from the past, then they are very unlikely to play something from an emerging artist and time is likely to be wasted submitting music to them.
(There is a downloadable list on the GMN of some of the stations/shows accepting submissions from independent artists).