Definitely I have to agree too, without a specific skill you're not going to be able to offer the readers anything worth their time. I love having discussions in the comments more than writing the actual posts!

I love 3D modelling and I'm okay doing it I'd say maybe beyond beginner but not advanced by any means. Personally when I watch tutorials they're always too time-consuming with the author advertising themselves and chatting before they actually start the project. Written tutorials are easy once you've mastered the basics of the interface but video are probably better for beginners. If you want to model start with really simply objects like cups. :)