can anyone relate? or suggest anything?

i just started my first job at 22 years old, something i thought would make me happy and relieve my depression. my job requires me to stand on my feet for 6 hours consecutively and my shins hurt and arm is sore from opening doors for people (im a door greeter). a customer complimented me on my customer service and asked if i was interested in working for her company. we agreed to interview tomorrow, which was supposed to be my day off, so now i have an extra long day ahead of me. so i'd have to go home, change out of my work uniform, change into some interview clothes that i don't even know if i have, and go back outside. she asked for a resume, but this is my first job, plus i don't know how to quickly make one. i'm grateful for these opportunities but i don't think i have the stamina to keep up. i feel weak because my social media friends seem to do it... but i don't think i can 😞