If you want to index your site, then you should create an account with Google Webmaster. Then, through Google console, you can submit your site URL for indexing.
Similarly, you can create an account with Bing Webmaster tool and submit your site URL there.
Another way is - use ping sites for indexing.
In case you want to know more about ping sites, you may visit
https://hariforyou.com/ping-sites/