Thanks again for your wishes Hassan
I believe you already knew about creating Express entry profile, if not go through the thread
https://www.canadavisa.com/canada-immigration-discussion-board/threads/express-entry-step-by-step-instructions.273928/ .
By creating EE profile, you would already have your IELTS score and Educational Credential evaluated.
Regarding OINP, general rule is that applicants with >= 400 will receive their NOI which is valid for 6 months. However, there were instances where province issue NOI irrespective of the score targeting specific NOC's (one can only speculate which NOC they will target). Hence, it is advisable to try all means for achieving the target score >= 400.
Now that you have everything sorted out, gather all the documents which is deemed mandatory and follow the application guide to apply.
http://www.ontarioimmigration.ca/en/pnp/OI_PNP_EE_CAPITAL.html. This link will provide a lot of clarification.
Your NOI is valid 6 months. Once registered, you have only 14 days to submit the documents , so plan accordingly.
Hope it helped.