>>312561339
>rigging
Top tip, if you don't know what you're doing don't even consider rigging yet. Weight painting is a blight. 

I wouldn't worry about fucking something on your model. Even those with a "main" avatar here have several versions of it at this point where they just redid it from scratch as they improved their workshopping. Just pick out some MMD you like and work on that first. As the other anon said, seasonal events are also good to practice model making.