You would mostly likely be able to get financial support, to get help from the army you will have to be married to your boyfriend (like housing in barracks etc) I would seriously consider deferring a year, because juggling a new born and a degree at the same time is incredibly difficult, what if you get post natal depression? It’s not impossible but people who do it have their partner to help, and since yours isn’t going to be around much then it leaves you on your own. I would highly advise you go to uni later, or have you considered the OU?