The CRS is moving around but it's not as high as 490. Obviously you cannot get points that aren't there so you should submit your application with your 421 score. There is a chance you would receive a ITA.
You've mentioned PNP nomination, how can I move forward with that?Getting more score in ielts is the answer. 7.5 is your total band. Your points depend on how much you score in individual subjects. Based on this, your score can increase by 50 points. So ielts is the answer.
Another thing you can do is go for PNP nomination that will increase your points considerably.
Or you can try getting a job,or a relative who can sponsor you.
Your points are not low, and there aren't many comparatively who have scores as high as 490. So I personally southwest wait for two months and check average scores cut off. You might get an ITA with the current score itself.
You have to watch out for announcements from provinces beginning to accept applications for PNP. Better be ready with all necessary documents before the streams are open because they close within few days.You've mentioned PNP nomination, how can I move forward with that?