Spanish Vocabulary Course

I’m beginning to learn Spanish and I’ve chosen to use the Pill Courses (https://www.memrise.com/user/eunoia/courses/learning/) to gather vocabulary

But

The stem changes are not indicated!

Is there a course that is as systematic as the Pill Courses (in how it’s organized by parts of speech and frequency order) but that provides the stem changes?

Or

Do you know of a way to edit in the stem changes

And

If so, would you help provide the instructions and some tips to do so?

Thanks So Much ! ! !

Alex :grin: