WTBH - I am so happy for you! My philosophy about a job is shoot - better like what you do because you are going to spend a whole lotta time doing it!
But most importantly, being able to look back and know you took a risk because you believed in yourself is HUGE!
P.S. I work with grants, and when I hire people with the caveat that this is potential to be permanent but no guarantees - what I really mean is 'you are on probation status until I make a decision to fight my administration for you or not'. Now go shine! And be so super proud of yourself!