Make a vase if you like, but consider this: Even a complex engine has many small and easy parts to make. Start making those parts in raising order of difficulty and you will learn. The engine you mentioned is a Diesel. Very experienced modeler have tried to make scaled down versions of Diesel, as far as I know, all failed because of the injector issue. You may want to revise your plans. People learn to crawl and walk before running the marathon.