I think that should not be a problem.
If after some time you feel more confident with visual storytelling, nothing forbids you to either switch to a comic, or continue both (or possibly, work on something else for a comic, as new ideas may show up in the meantime).
(My current comic started as a collection of illustrations with short accompanying texts. Then it evolved into a musical project. Then when I realized that at my current level of expertise, it would take 5 lifetimes to finished that musical project, so I switched to comics. Still hope to get the music project going someday...)