After quite some research for a good dataset with handwriting, I decided to create my own, since most sets were not very good (for my purpose). I created a little GUI to draw letter by hand, and give them a label. After doing some research in Jupyter Notebooks, I kind of liked the results and edited the GUI to test the model. It works quite well for me I’d say.

Images that are misclassified can be labelled. These get added to the dataset, and the model is immediatly refitted to improve performance.

Maybe have a look for yourself here, feedback is always helpful!