Good advice from both. Try playing over about 100-200 games using your selected opening. That will give you an idea of how the openings unfold. Pay attention to opening formations and resulting middlegame patterns. After each game follow Fromper’s advice. Using this method you will find you often play “book” lines without even knowing it because you are beginning to develop pattern recognition. That’s enough for now. There is no “easy” way to learn openings. Chess is like anything else you are trying to learn. Say a language. You learn words and sentence structure(opening moves and patterns) but you still have to practice speaking (playing) it. Along the way you’ll mispronounce words, use the wrong words, get them in the wrong order, not recognize slang, leave out words and speak in incomplete sentences. It takes a while to become proficient. It took me 3 years to learn English.