You do not need a private tutor to prepare effectively for the UCAT.
Some students find tutoring helpful, especially if they struggle to organise themselves or need explanations. But independent preparation can work very well if you have structure.
The most important things are access to good questions, clear explanations and a system for reviewing mistakes.
Start with a study plan. Decide when you will practise each section and when you will review.

Putting It Into Practice
Use your performance data to guide you. If your weakest area is Verbal Reasoning inference, practise that rather than spending another hour on a section you already enjoy.
You should also use worked solutions actively. Do not just read the correct answer. Compare the reasoning with your own approach.
Independent preparation works best when you are honest about your weaknesses.
You also need consistency. Without a tutor telling you what to do, you are responsible for keeping the routine going.
That can actually be a strength. Learning to manage your own preparation gives you more control over what you focus on.
A tutor can be useful, but it is not a requirement for success.
A clear system matters more.
