Newbie Brit in Virginia.

Hi everyone, im needing to get fit again and definitely lose weight after cervical spine fusion, the only exercise I am able to do atm is stationary cycling and walking, my major problem in my diet is not taking enough calories, I need a daily intake of 1,310 but have 752 to go and there's no way I can eat anymore food today. I have walked 1 hr and also done 20 mins on exercise bike. would love some ideas on recipes baring in mind im also a picky eater.