Can I answer my own question?
Yes! That's good and right.
You are as immersed in your task as no one else and may eventually find your own solution, different from others. Even long after the question is asked, you can answer your own question.
You can also share valuable information in the form of questions and answers. Document your knowledge so that lots of other people can benefit from your achievements without going through the same process all over again.
Asking and immediately answering your question creates additional opportunities for professional discussion and new answers from other participants.
Three days after asking a question, you can also mark your own answer as the best, feel free to do so if that is the case.