Triathlon Training schedule with fit by Wix

Question:
I want to use the fit by Wix App for my clients. I’m a triathlon coach and at the moment im sending xlsx documents each week. Now is the idea that I can safe some time with the fit by Wix app, and have a better usability for my clients. Has anybody done this before? Is there a possibility to get the xlsx document opened in the app, not as a download file. I want that the user is able to open everything in the app. is there an option to get a visual graphic what is done over the week (if the training is done).

Product:
Wix Studio and Wix Fit BY Wix

Best Regards Ben