I am newbie too, but I willing to share it for the first learn fly drone or FPV' hobbyist. To avoid the drone crash, suggests the below:

Firstly, do not flying in crowded place.

Secondly, ensure the UAV are free by adjusting image signal before flying.

Thirdly, practice with mini quadcopter before flying FPV. Besides, you are suggested to try with FPV after you are familiar with mini quadcopter.

Fourthly, ensure the power is sufficient before your flying or prepare several spare batteries because over-long continuation of flying journey contents you more and avoids crash from air for lack of power. Tattu RC lipo battery is suggested for its long-time continuation and strong burst.

And finally, come from your suggest, please leave a message to give a better suggest for newbie.Thanks in advance.