You can always use all your votes and then change them later on as you discover more about the witnesses.
However, It’s a good thing that you do research and ask about why you should vote for a witness before casting a vote.
As for me, it’s up to you to decide, obviously, but I’m also a developer and I have been contributing to the community by fixing bugs, redesigning and adding features to the Condenser (the app that powers Steemit.com). You can see my previous blog posts.
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