No, just a little throttle is all you need when you engage the power take off and start moving. You have a 4 speed, and single stage clutch ? If so that is basically it. Engage the pto before you get into the cut and increase throttle just before you start cutting and moving. The proofmeter needle on your instrument cluster gauge will show RPM's and there is a certain RPM that will = 540 RPM on the pto, which is what you want and the mower is designed to operate at. Obviously, you will have to put the transmission in gear and engage the pto before you let off the clutch pedal to engage the clutch and start moving/cutting.
Keep in mind sharp or good blades on the mower are important, just as much as having it adjusted on the tractor per the mfr's instructions. Most just level these side to side and allow for an 1" or 1 1/2" difference from front to back, with the front being lower.
Set your cutting height and leave it the same in the turn, if you have to do a loop at corner then think about taking center cuts after you have gone around the field enough to where if you cut down the center you can turn to either side to cut again. Basically, cutting from the middle out alternating sides until the gap is too wide. It depends on the shape of the field too. None of mine are square so I just make my passes on the outside and in one of the larger ones I then make cuts down the middle and as I get to the end of each, I can decide which way to turn and head for the next cut.
If you have to back up and cut, with that transmission, and a single stage clutch, you will have to turn off the PTO to shift, wait until it stops spinning before it will go into another gear. Might be a good idea to install an overunning clutch (installs on the tractors pto shaft) So you would have to start off by putting it in reverse, then engage the pto and start both at the same time, same way you do it going forward, put the transmission in gear (disengage clutch first) then engage the pto and release the clutch pedal to engage the clutch, then you will start moving and the mower will start spinning.
There is no dumb questions with a tractor and or a rotary mower, both are dangerous to an inexperienced operator, ask all the questions you need to and be assured its the best thing you can do. I've run tractors and rotary mowers since a young age, and I still learn a thing or to, its a never ending process LOL !
Overunning clutch