The Tottenham Hotspur forward won her first cap against the Republic of Ireland in July and she recalled being blown away by the high standard of the squad when she worked with them for the first time.
She told the Daily Telegraph newspaper: "I was nervous when I first went in because I didn’t know many players apart from Grace Clinton, but the girls were really nice and I settled in. There were a few under-23 players I’d known growing up, so that made me more comfortable.
"Experiencing the standard of training, it was, 'Wow, this is the environment I want to be in, learning from Sarina [Wiegman, the manager] and great players.' "
And Jess admitted her cap has quickly become her most prized possession.
She said: "Sarina presented it to me, and Lucy Bronze gave a speech, saying how I’d come in and fit in so well, how I’d dropped into training and not felt like an outsider. I was a bit shy but I’d been trying to get to know everyone and get stuck in."
Meanwhile, the striker will never forget some important advice she was given from her dad early on in her sporting career.
She said: "My dad told me when I was younger to train how I want to play. Throughout the seasons you train more than you play games, so the more you train like that the more you can replicate that in games and it makes it easier when you get to games."