Rank #1 on Google for certain keywords and increase my website organic search and conversions

My website (web app) currently ranks #1 for two or three keywords but I want it to rank #1 for a few other keywords. Here is a summary of what I want: 1- I want someone to help me rank #1 for a few keywords. 3- I currently have no blog and no content. I have a few internal pages like login, signup, etc. that I don't care about them to rank on Google. So I need you to help me create a few pages (or blog posts) that will help my website rank on Google. 2- Related to the previous point, I want to know if it's possible to have 2 or more pages (blog posts) of my website to show on the first page on Google for certain keywords. If possible, then I want you to help me do it. 4- I want you to take a look at my website and tell me what I can improve to get more conversions. 5- Tech me a few things about Google Analytics (like how to set goals, etc.)