I would take it with you personally.
I find the "Big Whites" are remarkably easy to use with little learning involved in my experience. I have made two cock-ups with long lenses - one was the focus limiter. You can imagine my sense of humor failure when I had the opportunity to get an Otter swimming on it's back at 6 to 10 meters away and looking me straight in the eye, even looked like he was grinning at me (did he know something????). My focus limiter was set from 15.8 meters to infinity = ARRGH!!!! The other one was the length of time it took me to find out how IS interferes with AF, however you don't have IS so no worries there.
Until you get used to using your new toy just keep the shutter speed above 1/500 sec and remember that you don't have much depth of field - but you will already know this from your Sigma. After a bit of practice you will be able to use lower shutter speeds (1/250 maybe 1/160), naturally if you are not using it hand held then it is the subject that determines the shutter speed.
Whatever you decide have a great time
Life is for living, cameras are to capture it (one day I will learn how!).