A: Not yet, but both are in the works.
We are building a template that will let you upload your own character. No release date to share yet as it is still in development.
On creating your own templates: this is also something we are working toward. The reason it takes time is that consistency and predictable quality are core to what Magic is. We want to make sure any user-created template meets the same standard as our library, not add noise to it. So we are being careful about how we roll this out.
Thanks for the patience, these are features we are excited about too.