@rahul_mule, AEM jar file is not all. You also need proper Java (JDK) version and license key. You can download Java either from Oracle page or from Adobe Software Distribution.
In terms of license key, you should contact someone in your organization, in general it is provided by Adobe as a properties file. So you should ask for license.properties file. Alternatively to get the license, you can download it from https://licensing.adobe.com/ (you need proper level of permissions to do that) you can try to request access by writing email to spphelp@adobe.com
Once you have all 3 elements: AEM jar, properly installed/configured JDK and license.properties file with AEM license key inside, please follow steps described under this documentation to start your local instance.
This also could be useful https://experienceleague.adobe.com/docs/experience-manager-65/deploying/deploying/deploy.html?lang=en#getting-started
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