slow recognition

Hi Everyone, I am 35+ Yrs old and new to speed cubing. Currently I solve a 3X3 using beginners method in approximately 1:30 but working towards learning CFOP. Earlier I never cared for speed but now since its speed cubing for me , I would like to get your advice on certain issues I am facing ...

I've noticed that my times really suffer when I first start each day. Is this a normal thing that other cubers experience? Do you have any advice for how to get back to solving with the same success as yesterday? It's like I'll work really hard for hours one day, and my time will drop by like 5...