There used to be a site called Daily Cryptogram that was very user friendly. If you typed a guessed letter in a slot, all the same slots became that letter. Made things very easy. But the site closed down about a month ago.
Anyway, sign me up, please!
Yes, there are many helpful sites on this.
Here’s one:
Hal’s Cryptogram Helper
My first cryptogram has an error. I have A=A which should NEVER be.