Twitching without asymmetric hyperreflexia, clinical (not perceived) weakness and/or atrophy is not ALS. Twitching with one or more of those other symptoms is worth investigating but even then most of the time it's coming from another source.
Clinical weakness means you can't open doors, button shirts, stand up on your toes, or walk on your heels. It means people can't understand you when you talk...you mumble and slur. You choke when you drink liquids. Those are signs of clinical weakness.
Perceived weakness=my wrist feels weak but I can do everything I used to do. It's hard to walk on my heels. My arm hurts and gets tired when I comb my hair...etc and so on.
The first is caused by disease.
The second is most often caused by anxiety or overuse syndromes.
If you are young and twitchy well welcome to the crowd. I have been twitchy most of my life. I crack and pop probably 10-20 times a day. I know some people who twitch thousands of times a day.
With all of that said, running this past your doc is always a good idea. Sometimes an overactive thyroid, or electrolyte problems are easily correctable causes of twitching. But, in the VAST majority of cases twitching is benign. Stop googling symptoms.