OINP priority occupations draw is linked to express entry and is NOC-dependent. If your NOC falls within those priority NOCs, and if you have an express entry profile, you'll get a notification of interest provided your CRS is within range. Usually they have a set number of candidates that they need to invite (say, 700-800), and they invite them on the basis of the last express entry cutoff. If the cutoff was 476, they'll start inviting from 475 downwards, only on those NOCs, and stop inviting when they reach their target number of candidates. Tech draw works in the same format, and the OINP tech draw on July 29th had invited CRS between 463 and 477 (the express entry cutoff prior to that draw was 478).
You can read up more about OINP in these links:
https://www.ontario.ca/page/ontario-immigrant-nominee-program-oinp
https://www.ontario.ca/page/2020-ontario-immigrant-nominee-program-updates
https://www.ontario.ca/page/oinp-express-entry-notifications-interest
If I were in your position, I'd still try to increase my score through French or other means. 453 is quite tricky for OINP as well.