Wedding dilemma

Hi everyone I am in need of some advice. For some background, my fh and I have been together for almost five years now. He enlisted in the military and has been serving for two years now. We recently got engaged last July and have been trying to plan a wedding. Of course with military things its hard to make plans which is what I need advice on. So we booked a date for May 19, 2022 which is coming up soon. We were planning to post pone it since he had been assigned to a special task that doesn't allow him to take leave. Meaning I haven't done much planning since we found that out. We just found out that he is deploying in July and will be home in May now. We have discussed getting married legally so I can be on his paperwork when he comes back from deployment and make things easier for the future. I am on board with doing this but now I feel weird doing a wedding.... My grandparents graciously bought my wedding dress already so now I feel like I am obligated to where it which I do because I love it. It is hard because I have envisioned everything and all the friends and family that were going to see us wed but now I am just overwhelmed. Any advice on this situation?