My advice would be to take time to re-iterate through simple things. If you have understood a particular language construct, take time to "play" with it a bit and try it in several application cases. Maybe some program which calculates something easy, or something that prints out something.
Also, check if the Rustlings course is something that you enjoy.
Here are two other posts by me on that topic (in different threads):
You may also look through the other posts in those threads.