Trying to find that perfect theme

Now if I had the time I would start to create my own theme, or maybe modify an existing theme. But currently I haven’t the time, so I’m experimenting with the wonderful work of other people. But I have two questions:

  1. Is it possible to search the theme repository by attributes: grid, side-bar, supports comments, supports mathjax, masonry, date of most recent commit, and so on?
  2. How easy is it to turn a jekyll theme into one for Hugo? Is it just a matter of changing a few variables, or are the theme engines so different that they can’t be easily converted?

Thanks very much,