Its OK.
I wouldn't upgrade anything. Get a couple of extra battery packs.
Every crash is different so it is impossible to say what exactly will break.
Main blades for sure and probably a main shaft.
I say not to worry much about upgrading your FP heli as it is only temporary anyway, you will want to move on to a CP heli pretty soon after you get used to the FP and that is where you would want to go for better gear.