I'm trying all day to download Android studio. Two issues I'm having despite following The New Boston Tutorial on YouTube. Where it has the option for the 3 components (android studio, source code, etc. can’t remember the 3rd one)

I cannot select Android Studio. It doesn't allow me to select it. So only 2 of the 3 is selected. Next issue I have each time I open Android studio it's going through the whole download procedure again as if it's the first time I'm downloading it when it's Actually downloaded already. Can someone please assist me with this. Thank you