You've asked a question impossible to answer without lots more information.
Regarding what places you can visit in four countries - Austria, Scotland, Switzerland, England - that's why thousands of pages of guidebooks by various authors including the host of this website have been written. Rather than repeating what they have written the easier way is for you to buy or borrow, maybe from a library, copies of some guidebooks and study them. Or at least give some idea of why you are interested in those four countries and what would help you choose between them.
What kind of weather would you prefer?
What is confusing you?