If you want to be a digital nomad, first forget about the stereotypes. Like the one in the image above, lol. Your Clients are not going to wait for you while you are resting on the beach.
First, the reality of being a digital nomad. You need to be very good at planning and prioritizing, and you need to know very well how to motivate yourself. Each time you move from point A to B, you need to keep in mind time zones, potential delays, work deadlines, etc. Also, you really need to love what you do, because often the choice is between working or enjoying some time on the beach (like in the above-mentioned picture that you always see associated with digital nomads), out with your friends, exploring new places, etc. There are no physical constraints which make you think "I am here anyway, I better work" if you are not motivated yourself.