Finding Longitude and Latitude of Destination

Here's what I tried:

But I need help to find out how to get latitude and longitude of the user's destination... Could you help?

So basically you need to find lat and lng from the adress given? If so you need to geocode the address. Read OpenRouteService-Geocode. Use web component and dictionary blocks to get coordinates

Sorry forgot the easiest way... Just use call location sensor latitude and longitude from address

How is the destination chosen?

From touching the map?

From a list of place names?

Pre-entered list?

You might get specific advice on your own by answering ABG's questions.
I guess all you might need to do is make this change

If you don't want to do that, perhaps these three tutorials will help: