I echo what everyone else said about the discernment process, it is super important that you follow the proper channels and in the order expected. While I certainly had classmates who went through discernment while already in the MDiv program the process has not been as easy for them and their job prospects after graduation are not as clear.
What the actual requirements will be for your Anglican studies will be up to the bishop and seminary but most typically it is a 2 semester diploma and also covers things like anglican liturgy, preaching, and music which are all very important for the priesthood, not to mention the formation that happens by living and studying within an Anglican institution.
But since you are interested in doing a thesis you might want to look into doing an STM in Anglican Studies which is usually 1 year and includes a thesis which you could focus on Christian Ethics within the Anglican tradition.
