Nothing is ever sure, but scores in the 480s should be fine... there are kind of "shelfs" with points. For single FSW applicants who have never worked or studied in Canada, the max you can get without any "extras" is 481 (perfect IELTS, 29 or younger, masters degree, 3+ years work experience).
Unless they change the rules, I highly highly doubt scores in the 480s won't be sufficient...
But for 474, I think that should be fine but learning french is not a bad idea. You don't need to get all the way to B2 level to get points. Getting to B1 across the board will get you 4 points I think?