A classic novel can feel harder to start than it is to finish. Older language, unfamiliar social rules and a long cast of characters are easier to manage when you choose a book that genuinely interests you and give it a few chapters to settle.
Choose by the story
Start with a premise you want to follow, not only a title you feel obliged to read. If you like witty conversation and character-driven stories, Pride and Prejudice is one possible starting point. If you prefer mystery, adventure or a shorter book, choose accordingly.
Pick a readable edition
A clear digital or print edition matters. Some editions include footnotes and introductions that explain historical context; save introductions that discuss the ending until after you finish. Project Gutenberg offers a free digital edition of Pride and Prejudice. Copyright rules differ by country, so check local rules for other titles and editions.
Read steadily
Set a manageable amount of time instead of a daily page quota. Make a short note of characters when necessary, but let the story lead. If an unfamiliar word does not stop you understanding the scene, you can keep reading and look it up later.
After a few chapters, decide whether the voice suits you. There is no single right order for reading classics.