It is difficult to estimate exactly how much a beginner freelance web developer will make, as it can vary widely depending on a number of factors such as location, experience, and the types of projects they take on. However, I can provide some general information on the subject.
As a beginner, it is likely that you will start off with smaller projects or projects with lower rates. However, as you gain experience and build a portfolio of work, you may be able to charge more for your services and take on larger, more complex projects.
According to data from Upwork, the average hourly rate for web development in the United States is around $50 per hour, with rates varying depending on the specific skills and experience of the developer. However, as a beginner, you may need to start off charging less in order to build a client base and gain experience.
In addition to hourly rates, some freelance web developers also work on a project basis. In this case, the total amount you can earn will depend on the scope and complexity of the project, as well as the rate you are able to negotiate with the client.

It is also important to note that as a freelancer, you will be responsible for your own taxes and expenses. This can include things like equipment, software, and office space, so be sure to factor these costs into your rates when pricing your services.
To increase your earning potential as a freelance web developer, it can be helpful to specialize in a specific area, such as a certain programming language or web development framework. Additionally, building a strong portfolio of work and networking with other professionals in the industry can help you to gain clients and increase your visibility.
In short, as a beginner freelance web developer, you can expect to make anywhere from $20 to $50 per hour, and as you gain more experience, you will be able to charge more. It is important to start small, and gradually build your portfolio and reputation.