Need advice for losing weight working nights full time.

I (26M) am 6ft 0in & 290.5lbs.

I want to get to about 200-215 lbs. However, even though I’ve been living strictly off a couple fruits and multiple protein shakes (with water only) each day for the past 2 weeks, I haven’t lost any weight.

In fact, I have gained about 3.5lbs.

I don’t have the time or ability to workout very much because I have several injuries that have left me partially disabled, so I’ve opted for the starve out the fat method.

I carefully counted every macro and calorie. I should only be consuming about 700-800 a day but I’m not seeing any progress.

I need to loose at least 60 lbs in the next 5 months or else I’m going to be cut from my friend’s wedding party and cut from the guest list.

If anyone has any advice or suggestions I would be grateful for any assistance.