Update from wordpress.com to .com

Yes, but are you asking about using your own domain name on WordPress.COM or moving to a self-hosted (www.ads-software.com) site?

i am asking about my blog domain on wordpress.com. at the begining, i wanted to check it out, before i commited to buying a .com or .org. is there any way to update that now?

If you want to keep your site hosted on WordPress.COM – you need to ask here: https://en.forums.wordpress.com/

If you want to move to a self-hosted site, see:

https://en.support.wordpress.com/moving-a-blog/#moving-from-wordpress-org