I think you are selling yourself short by not asking questions particularly as a junior dev. Depending on the role, people are hiring you for not only your current skills but your potential to grow. Write some questions down in advance - no one is going to ding you for having a cheat sheet for asking questions.

Here's some questions I'd ask:

- what sort of training or growth opportunities do you have? - do you offer any aid for continued education or online courses? What about conferences? - do you have a buddy or mentor program to help me get moving quickly? - Are there any books or resources you recommend so I can hit the ground running? - If I got the role, what would make you feel you made a great hire in 6 months or a year?