I think I would like to also add my best wishes but I think this is an impossible ask. I learnt fast just under a year and that was just to get to a level of holding my own on the 1st trumpet parts in a concert wind band. In a jazz band you will be totally exposed. At least you can read music (I presume) and have developed your ear a tad.... Get a GOOD teacher is sound advice. what will determine your level of progress is the muscle development, building the muscularity of your chops, ask any body builder if they could start from scratch and in two months enter a high level contest, Once your muscles have developed, you will then need to develop the fine control of them and the airstream and the ....... well everything else.