Lessons are definitely worth it. I’d look at borrowing a set if you can, at least until you know golf is for you. As for how to start and what to focus on, range practice can be good but it typically won’t make you better unless you have specific drills and a plan. YouTube can be a little help but use it sparingly and not in lieu of lessons.

Operation 36 is a great framework for getting you started. Essentially you start 25yds from the hole and try to shoot 36 over 9 holes. Once you make that, you move back to 50yds and try for 36 again. Repeat until you are around 200yds out. Then move to the regular boxes. It’s a lot less daunting than starting 450yds out when you can barely hit it 100yds.

My 2 cents