A) Find an area of physics which is interesting to you, whether this be astronomy, quantum, electrical, or simply motion.
B) Find a good teacher of that area of physics. If you can't find one IRL, there are many brilliant people on the internet who are informative and engaging, such as the YouTube channels SciShow, MinutePhysics, 1Veritasium, and SixtySymbols among others.
Once you've found an interesting topic and an interesting teacher, it will be much easier to concentrate on the hard concepts in physics. And if this still doesn't work, turn off your wifi and go do your physics study somewhere where you cannot possibly procrastinate.