Finally, after weeks of hard work, I have completed the MVP that demonstrates fully-functional features. In particular in the past few days leading up to today, I always felt like "I'm ready expect for these two things".
Being able to officially announce my MVP also means that today I share it here on indie hackers and forward the URL to some friends.
From now on, I plan to focus on new features like: Facebook login, RSS subscriptions, possibly deliver digests to Slack, etc. I have a long list of ideas and now comes the prioritization :)