I have this lab that I completed, but I don't think I$\text{'}$m following the correct steps.

I use Logistic regression, and I attached pictures of what is required.

Do I need to do preprocessing here? And why? What are the things that I should change in the data set?

I want detailed notes on the solution method, results, and plotting.

I also have a question $($Is it always necessary in Logistic regression that the form of the function be represented by the letter $"$S$$ if it is otherwise, is this model not suitable for this data set?$)$

Also, I was not able to determine what is best here... Do I use all features with dependent? Or do I look at correlation for features and choose the feature based on it$?$