First step is just saving as much money as possible, getting a remote job that you can hold consistently as a 21 is extremely difficult. This my strategy, I work my butt off while I still live with my parents so I save most of my paychecks and then I use that money for travel around the US and Europe. Also make sure you are used to traveling around where you live so you can get a feel for being in the road for long stretches of time.
First step is just saving as much money as possible, getting a remote job that you can hold consistently as a 21 is extremely difficult. This my strategy, I work my butt off while I still live with my parents so I save most of my paychecks and then I use that money for travel around the US and Europe. Also make sure you are used to traveling around where you live so you can get a feel for being in the road for long stretches of time.