Yes, you need more Hive Power (or staked Hive) to have more resource credits to be able to post comments or posts on your blog. I would suggest reading those two posts I linked for you and then checking out the comment sections to see the questions and answers.

There is a lot to learn here but once you figure it out it's all much more fun. It's better to get a feel for how things work and connect with people than to just post and post. If I were you I would read those two posts and then work up an introduction post that will be more than just an updated bio.

I have a feeling that you are going to do very well here once you get your feet underneath you with a firm foundation! Greetings from a Texan in Sweden!