If you’re truly serious about learning a new language like German, the most important step to do is commit to it. You’ll need to commit your time and effort to studying in the evenings and at the weekend.
Firstly, you’ll need to make sure you have the right learning material acoording to your German level. Secondly, you’ll have to make sure you learn regularly. And finally, you’ll have to make sure you learn German with a passionate native German teacher.