I know many personal finance writers with blogs that track the financial mess they got themselves into. They don't have financial degrees, but they are doing very well for themselves and help many people with their experiences. Many times, readers just want to hear from you, follow a real person's journey, read about how a real person made it through a problem, and so on. This is a great example of why degrees are not always needed.
As you can see there is no shortage of methods with regards to making money on your blog. While it might be tempting to try and make money right away, I would advise you to focus on getting a nice foundation built up. Offering services from day 1 can work out for you and bring in some clients, but as your blog grows you’ll find that your time is better spent making products.
If you are using a free blog hosting service instead of your own domain name, you must provide high quality content with a limited number of relevant links or risk being shut down. If you are only interested in writing short, quick product reviews in order to earn money, you will need to host your own blog. Be warned that low-content, high-link blogs are a less reliable, though lower effort, way to earn money.
If you are new, obviously don’t try to fit all of these income streams in at one time. You should build on it and work on one at a time. Slowly build your income. Think of it in terms of a job. When you start out at a job you don’t usually start making the big bucks right away. After time and experience come into play, then you start making more and more money with raises and promotions. Now you can make a ton more money online than a typical job but it is the same concept!