The more flights you get under your belt the more relaxed you will become when flying it. But I know what you mean, I still get butterflies in my stomach when I go above 300-400ft or fly over water.
Top tip - be sure you know how to flip to ATTI mode quickly, if it starts acting up or flying in a weird way and you panic, flick it to ATTI mode and you can gain complete control of it usually. Means you need to fly it manually for a bit but at least if you get into a 'fly away' situation you can regain control easily. The S1 (right hand) switch on the TX controls flight modes. Top is P-GPS mode, middle is P-ATTI and bottom is F Mode (Follow Me, FAP, Waypoints etc). Flick it to the middle for ATTI. It'll still hold altitude in ATTI but it will drift a wee bit as its not locked to any GPS Sats. S2 left hand switch will if flicked from top to bottom and back up again a few times, initiate a return to home - also handy to know. And make sure you set your RTH altitude high enough in the DJI Go app to save it flying into a tree on its journey back to you.
Another top tip - pick up a second battery if you haven't got one. Your skill levels will increase in proportion to the amount of flight hours you gain, better to have two or three batteries so you can get as much flight hours in as possible. I've got 2 batteries at the moment and have just ordered a third.
As far as editing video footage goes, there are lots of choices and opinions. I'm currently using Sony Vegas Pro 13.0 64-Bit but its got a steep learning curve. Previous to that I was using Davinci Resolve which is a free editing program and absolutely superb, but again its a bit of a tricky one to get your head around. The easiest and most feature rich editor I've used so far is Wondershare Filmora:-
http://filmora.wondershare.com/
Brilliant program, really easy to use and produces good results at 1080p. And its completely free!
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Only drawback is that it wont do 2.7k or 4k output but then that's pretty academic anyway if you are uploading to Youtube or Vimeo to show off yer videos.
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