after installing wordpress, i cant acces my wp admin panel

Make sure that the files were properly installed in the new server’s web root.

Not all servers use the same web root schema. Some use /public_html/ some use /www/ some use /web/ etc.

Also, make sure that you’re following https://www.ads-software.com/support/article/moving-wordpress/

What URL are you redirected to when you go to your-domain-name.tld/login ?

If you have WordPress installed in a subdirectory, you may need to login there, for example:

https://your-domain-name.tld/subdirectory/wp-login.php

Something else to consider if none of the other replies help, is that there could be a plugin/theme conflict. Especially if the front of the site works fine.

Since you cannot access the dashboard to check for a plugin/theme conflict, you’ll have to use FTP/SFTP or some similar host provided File Manager:
https://www.webhostinghero.com/disable-wordpress-plugins-when-site-crashes/

If that doesn’t help, please try temporarily renaming/removing any server configuration files like .htaccess, php.ini, .user.ini, etc.

Finally, please check to see if there are any hardcoded/custom URLs in the wp-config.php file or theme files still pointing to the source site’s location that needs updated:
https://codex.www.ads-software.com/Changing_The_Site_URL#Changing_the_Site_URL