I can't believe that it is 6 (count 'em, SIX!) years since I turned 50 and decided that it was time to learn something new. I picked German, thinking maybe it would help me with my interest in genealogy and might help with my paternal German side.
So, I started with a local community college course (lucky for me the community college is only a few blocks from my house) and Duolingo.
I struggled. German is hard and my brain is soft. I took German I three times before I felt ready for German II. But I had fun.
And after struggling with it, I asked myself, "why the heck am I learning German if I don't go someplace where it's spoken?" and took my first trip to Germany in December 2014. And went back to Germany in 2015. and 2016. Oh, and 2017, too.
How's my German now? Well, improved but it still needs lots of work. But I have expanded my brain and my experience and my world and my circle of friends.
So, Yes, start. But also understand your personal goals and motivators....understand them and work with those as your guides. While, of course, I wanted to be fluent in 30 days, given where I was and where I am, that's not realistic. We need opportunities to actually speak it and, sadly, my current opportunities are limited. But I do online exercises daily, keep attending local community college classes, travel, and am now almost done (after a year) of reading my first novel in German.
But, I wonder still how I can improve and am looking forward to a longer visit with an intensive local language course. And, after 6 years, I think I just might be ready.
My advice to you: start small with both an online component and some type of local instruction. Then take a trip and get excited that you understood even one small thing in the language. Then, once you have a better understanding of your true motivation, figure out the best way to make it happen based on both your desires and real-life constraints.