Nuts - Yes
Insured - probably not
Safe - You'll have to answer for yourself
Overall verdict - risky, but you seem to have got away with it!!
Would I have done the same - probably (but over a period of 30 yrs, I've been talked through a number of basic aero manoeuvres by RAF pilots sitting in front / alongside me whilst I make various attempts)
IMHO, going off and doing some aeros without any sort of experience / training was not the most sensible thing to have done. Confessing to it publicly on PPRuNe was probably even less sensible as you're probably going to get flamed like you've never been flamed before!!
On a personal level - good on yer' - shows a healthy disrespect for the rules, which is not always bad!!