I was delayed a few hours on my 1st solo as I couldn't quite master the landing. I got there in the end, and it's never been a problem since.
The people I was learning with actually laughed at me for not being able to land very well, but I just laughed right back at them months later when I found nav so easy and they were all struggling.
As said above, most people will probably get a bit stuck on something, it's all about how you deal with that.