RE: Need your advice please.
Well, if park flyers are your thing, then that's OK. As for the jet and brushless, it seems as though that's your preference. Since that appears to be the case, perhaps one of those flat foamies are what you're looking for. I would not invest in a full-build R/C jet in your case, since you will likely go through at least a couple airframes before you master the art, so to speak. With all that said, it is best to stick with 3-channel and park flyers, and those flat foamies seem to make the most sense. Should you get bored, you may look into something better but who knows. But for now, I have a hunch that this hobby's not going to be a life-long persuit for you. For obvious reasons, a car comes next, as I'm sure you would agree!
NorfolkSouthern