1. What are the best places where I can get the coin listed for the first time?
That depends on your budget* and what kind of coin is that.
How much we are talking here? First of all, since you are looking for
"the best" your choices will only between those tops
(for let's say the top 1-10 in volume ranking). For that, contact their support about listing to give you accurate details on pricing since reading other references about pricing on other sites might give you an expectation.
2. What are the most read crypto blogs?
For marketing and advertisement purposes?
https://detailed.com/cryptocurrency-blogs/