Check out their whole website and click on all links that contain information about the cryptocurrency. The homepage gives us the basic idea and the purpose behind the current cryptocurrency.
If you still don’t have any idea or aren’t able to understand the cryptocurrency then you should make use of secondary sources. Try watching videos about it on youtube. Many YouTubers provides us with easy to understand insights about the coin.
Study their whitepaper
Check out their founders and core team members. You will find their info the website itself. Check out their interviews. Research on their profile on LinkedIn, Facebook and Instagram.
Check out their Reddit. You will find answers to many of your questions. Make use of search bar and if you still don’t find an answer better ask the question.
If you want my secret spreadsheet go here > Cryptocurrency cheat sheet