Tips: Research "P" factor and thrust alignment. Use a flight sim to learn a little about how they fly. Repair the Explorer or build/buy a trainer design. Keep control deflections to those recommended or a little less, (too much deflection makes the aircraft almost uncontrollable for a beginner).
Always be gentle with the sticks on the transmitter in a car you do not turn into a gradual curve with full lock so avoid doing the same with your plane maneuvers. Know the range of your radio system and NEVER exceed it. Always use a battery voltage alarm.
Always check the control function and the direction of control surface deflections prior to take off, some transmitters have been know to reverse a control for reasons unknown when first powered up.
When flying stand with the trees behind you and never allow the plane to get behind you. Fly high and use the throttle to keep speed reasonable, (too fast or too slow can make control difficult to impossible and too low gives you no ability to avoid a sudden crash or a tree that just appears in front of your plane). Fly PROACTIVE and NOT REACTIVE! This means plan where you want it to go and use the controls to make it go there. Too many beginners watch the plane fly without any idea where they want it to go or what to do next.
Finally ask for help and sift the answers etc you receive for relevancy and implement whatever measures seem appropriate.
This is just a basic list of the things I tell my new students prior to their first flight and expect them to follow each flight until they are competent enough to ignore everything I say
ONE LAST AND VERY IMPORTANT RULE:- NEVER GIVE UP!!!!!!