Can I change my URL back?

Hi everyone,

Only this morning I migrated over from wordress.com using hostgating. Just to be clear I am a 100% novice and I’m at the beginning of the road to understand what HTML codes are and how to work the wordpress.

When I was importing, I remember filling in an extra box next to setting my URL. I did this as I was watching a tutorial on youtube who did the same. So I put;
https://evolveandexpress.com/admin
I just wrote admin to put any word as my tutorial did.

Now, after transferring, all my data is in my dashboard but not in my website… This took me ages to work out where it was and I have no idea how to put it back. I have had a go at changing theme, and some pages work and others are a complete mess. I have no idea what to do… Now my sight URL which I want has nothing in it.
https://evolveandexpress.com/

Is there a way to put this back? Even better, one that I could understand?

Thanks for your help in advance (sorry it was a long explanation) Please go easy on me, I’ve been reading these forums all night and i have no idea how to access these codes at this point!

Angela