Glad to note that P36 Submission has come to an end and you are working towards the P37 (Nov 18) Submission.
For those who intend to look in to T8/15, the applicable industry classification is expected to be published in July. The other topics are not subject to any changes and there should not be any issues in starting early.
Regardless of the topic being chosen, there are several materials to be read in detail and would strongly suggest to read through the exiting Information Pack in detail, which outlines the requirements and expectations in detail.
The earlier you start the better time management you could have and more that produce deliverables with high quality in achieving good grades.
Feel free to post questions if any and happy to assist.