You have done all your calculations etc so why are you looking for approval? Just crack on and get it done.
Its probably like flying solo for the first time ... going through the motions that you have done before but up until this point under some kind of supervision. Now that you have demonstrated a satisfactory circuit ... of the airfield ... including practising what to do if it all goes wrong; the instructor gets out and says all yours ... just bring her back without a scratch! Now prove it! I suppose I am looking for that second pair of eyes to check prior to launch!