Hi Carrie,
Congrats to you and your FH.
Please don't let your studies be a factor to your marriage.
Since you both are ready to move on to the next phase, do proceed as along the way sometimes your plans may change and who knows you would be holding your Customary less than 3 years.
Just like me and FH, we used to thought that we would have our Solemnisation and Customary on the same day sometime next year but then we are getting ROM this coming November and most likely our Customary would be held on 2nd half of next year.
Most importantly, just follow your heart. Cheers!