Scaling up to an m10 from an m0 is relatively straight forward… here are the docs: https://www.mongodb.com/docs/atlas/scale-cluster/ and https://www.mongodb.com/docs/atlas/scale-cluster/#std-label-scale-cluster-instance specifically…
You’ll essentially visit your MongoDB Atlas UI console and click Modify cluster. Select a new tier (m10). MongoDB atlas will deploy a new m10 instance in the background and migrate your data from your m0 instance to the newly deployed m10 instance.
Hope this helps… let us know how you make out.