@aerovision ,unless you have kept up with the correct battery storage , during that long period,there a very good chance that the batteries are dead
so you could be looking at replacing them ,you also need to make sure that the RC battery will take on a charge as well,check the App for any updates ,and also give the drone a good check over ,it is also possible that the IMU could have issues from such long inactivity, and therefore do an IMU calibration ,along with a compass calibration ,if all is well, when you go for your first flight just hover for a while in a nice open space at a fairly low altitude ,then try out the RC controls to see how the drone responds to them, also check the settings in the App ,only when you are confident all is well ,should you begin to fly further and higher away from the home point
also depending on your location check your countries rules and regs as a lot has changed in the last two years