Please someone tell me about it
Hello, for type scale use this - https://type-scale.com/
for colors as a beginner try to stick to only one accent
for spacing you are no need to make it just a number, you need to make all relatives element linked to each other to create hierarchy, I guess you could google “spacing in web design” or something.
I recommend you to post here the final solution and do not ever rely to others this will lead to nowhere