I wouldn't bother with most of the sites @Ashiq listed. They look super sketchy and out of date. Although some of the sites listed on outreachlistwp.com might be worthwhile, it's unlikely you'd hear back.
Forgive my bluntness, but I'm not sure how else to put this...
While luck can certainly be a factor in a theme's success, all the luck in the world couldn't help DistinctPress, because there are literally thousands of other free WordPress themes with the exact same layout and clean/minimalist style.
The #1 thing you need to do is to make a theme that stands out from the crowd. Easier said than done, I know, but if you can figure that out, these WordPress news outlets will be coming to you rather than the other way around.
WP Tavern has a category for themes. I suggest starting there for a better idea of what type of themes get featured beyond the recently published list on WordPress.org.