Svobodni_Lezci
You have a very interesting idea.
Consider loading your climbing data as Lists instead of into Labels and avoid using lots of Screens.
Make a List of urls and your location coordinates and they can be synchronized with your climbing data. You can use them to provide a map and a Web link of your sites.
Here is an example of part of your app built using a ListView, ListPicker, WebViewer and a Map component.
The example is displayed on a tablet and uses a single screen.
What you are doing with your Projects looks nice but is complex. If you intend to include lots of locations in the app consider using Lists and the List tools and they could simplify building your Project. You might also want to consider putting the basic data into a database (FirebaseDB, CloudDB or Google Sheet used as a database) to make adding additional venues easier to manage.
Good luck. I am looking forward to see your progress. Great idea.