First all, you need to play some tournaments where there quite a few 1900 to 2100 rated players to serve as your step stones, of course, you need to beat a few of them. U1900, U2000, U2100 events are the main avenue you need to target. Don't play U1850, U1800 events as playing against players at or under your rating, you win tiny and lose big as long as rating is concerned.
Skill wise, spending lots of time, training serve and receive, get really good at them. Also develop some reliable winning settings through specially designed drills. What not to do is mindless, endless top spin drills and only use them as warmup.
I remember years ago, I stayed at 1850 for a while just playing local tournament. Then, one day I traveled couple of hours to a nearby city for a tournament. The tournament size was about 40 players, not that big. I only played one round robin event of about 12 players. However, this group happened to have 6 players rated between 1850 to 2050. I ended up winning the group with only one loss. My rating was over 2000 the first time after the tournament.