It's a good idea to practice using the GO simulator a bit to start. It's fun but gets boring real quick. Then you move out, just go. Find an open wide area preferably with soft grass (like a football field or something). Start with little wind, to feel how it affects the AC. Just fly around doing slow maneuvers, changing altitude, feeling the response to the commands...
The real trick is do a few good "figure 8's" in different orientations. Sound easy but it's not. Try to do it slightly above your height, or around 8 to 10ft. is just fine IMO. You can use prop guards to save on props, or build a AC saver like the ones we use on copters for teaching and practicing. I for myself just prefer to just be careful and take it slow because those devices can affect the flight, not a big deal at this point especially if you take it easy and fly low/slow but still... up to you that one.
Don't get close to trees or other stuff before you are really good. But don't use your own judgement to know if you're already good. If possible, get an expert's opinion, someone with experience in RC. Remember that "good" is different than "confident". You can get confident without being yet good, and vice versa too. Confidence usually comes sooner than we get really good at something and that causes accidents.