Help finishing some features of an Android App

We have this project called Baia Mare Bike Map, developed by our NGO, Muntzomani Association, that's based on a map with cultural objectives on it, from the city Baia Mare, Romania. We established 5 bycicle trails that describe 5 cultural domains. We have the map, the objectives and the graphics for our app. Right now, we need help with a couple of features that will be described to the winning bidder: - Application optimization -> now it's loading a little slower. - Bottom sheet design -> now is very basic nestedscrollview - FAB change the icon depending on what color you choose - Each button on the list need's to send you Google Direction with coordinates of your location to the selected marker - splash screen with sponsors - account details on top of navigation slider (image and email) - after a marker is pressed, in Bottom Sheet needs to remain just the details from that marker and after You press on map or the back button, it needs to show all markers