there are several model aircraft jet-engines on the market...a search on "youtube" will find a man in a wing-suit with these engines mounted on his boots. he launched from a drop-sircraft after "lighting up" and achieved climbing/horizontal flight whilst his fuel supply lasted.
Yves Rossi, the cross-channel "birdman" also uses these engines.
Apart from the engineering challenge, I think you are trying to re-invent the wheel.