It is often a mistake to decide to wait for 2 years. A lot can change in 2 years, maybe your ex will refuse to give her consent, for any reason logical or illogical. If the marriage is over then it makes sense to end it now rather than waiting.
You could get a Separation Agreement but this is not watertight and will need to be revisited on divorce anyway, so it''s a bit of a waste of time and effort really. Might as well just divorce and get a Consent Order. It''s cheaper and less hassle.