There is no one-size-fits-all answer to this question, as the effectiveness of online UX mentorship programs will vary depending on the specific situation and relationship between the mentor and mentee. However, in general, online UX mentorship programs can be a valuable way to learn from more experienced professionals, gain insights into real-world projects, and receive feedback on your work.
If you are looking for a UX mentor, it is important to find someone who is a good fit for you. Try to find someone who is knowledgeable in the areas you want to learn more about, and who has a similar professional style and personality. You should also make sure that you are comfortable discussing your work with this person, and that you have access to them on a regular basis.

If you cannot find a mentor in your area, or if you are looking for more general advice on your career, you may want to consider an online UX mentorship program. These programs can provide you with access to a range of experienced professionals, as well as feedback on your work and helpful advice on your career.