Direct ITAs are currently being issued to scores 473 and above. So to get an ITA with your current score, you will either need a PNP or LMIA backed job offer which will add 600 points to your score and make it 928.
I am not sure what your current IELTS score is. If you improve your IELTS score, you can easily cross 400 and stand a chance to get OINP invite.
IELTS plays a very important role in boosting your CRS score. Ideally getting CLB 9 in IELTS (LRWS 8777) will give you the best points, You can try different values in the calculators here and see for yourself how much of a difference IELTS makes to your CRS score.