You’ll need to clarify what is not working for you. Right now your site is redirecting to https://biradartech.lovestoblog.com/; if you’re not seeing this redirect, you’re facing a DNS cache issue, and the article above mentions some steps (flushing your DNS cache, changing your DNS resolver or using a VPN) you can try out to see your website faster.
If you (also) don’t want it to redirect to the free subdomain but use the new domain, you’ll need to update your site URL in your WordPress configuration: