Job tips :(

I just got a full time job as a caregiver and part of my job is working the dining room during dinner. And I CANT SEEM TO CARRY A TRAY OF FOOD. Like I deadass can’t carry a tray. I can transfer people from bed to chair and other things but for some fucking reason I can’t work fast enough to get everybody’s orders and then I’m not strong enough to carry the tray of food out OR CLEAR THE TABLES AFTER EVERYBODY IS DONE EATING I have no idea why I can lift a person who can’t stand on their own easily but can’t even clear a table.