The Denmark goalkeeper left Villarreal for Chelsea in August, though his time in Spain also included a spell with Real Mallorca. Jorgensen had 12 months at Mallorca before being spotted by Villarreal.
He told chelseafc.com: "I signed my first pro contract then, when I was 15. It was a very good feeling. I was very happy. It was my dream to go to the academy of a big club.
"The hard work had just begun. I always enjoyed it, though. For me, it was never hard work. I enjoyed training extra and doing my extra things. I work a lot in the gym to be more explosive, to jump higher. I watch a lot of other goalkeepers.
"I always had that desire to work hard. It could be why I am sitting here."
He added, "As a boy from Sweden who watched a lot of football, I always knew about Chelsea and what a big club they are. And the project they are doing is very good. That’s why I wanted to sign.
"I have enjoyed it very much, even more than I expected. Everyone has been very welcoming. With the facilities and everyone to help you train hard and get to the highest level, it is a dream for someone like me who loves to train and to develop.
"This year I want to play as much as I can, win the Conference League, win titles, and get better every day."