Well done - getting started.

Questions:
1 - Do you have a website?
2 - On your website how do you invite subscription?
3 - Have you got social profiles?
4 - On your social profiles, how do you invite subscriptions?

So you've guessed, you need to get people to visit a place on the web which you own (website / social profiles) and then invite them to join your newsletter. Consider what 'offer' you can make which is attractive to them in addition to getting the articles. Sumo.com has a good Wordpress plugin for subscriptions. Also check out Push Notifications as many sites prefer this as subscribers won't share their email address. I wrote this article about Notifications
http://creativeagencysecrets.com/push-notifications/

Things for you to GrowthHack test
1 - Is 10 articles too few / too may / just right?
2 - What offer can you make to subscribers?
3 - How are you monetising your newsletter?
4 - Which brands can you collaborate with to grow your list with theirs in a joint venture arrangement?
5 - what are your key metrics and ideal customer profile?

Good luck and keep up the good work.