Noob need help with URL error

Hi all, I need help with my URL error. I did do research on how to correct my URL problem, but totally lost in the way. I have no background on SQL, FTP or coding etc.
I’ve created a website using wordpress, it work fine but Ive made change to the URL and now I cant access to my website or login using wp-admin.

My original website URL http://ulamanasihulummah.com/

I added “1” at the end, now the new url http://ulamanasihulummah1.com, after saving the setting, I cant access it anymore. Pls help.

Thks.