I need SERIOUS help

Edit to add: I’ve literally worn a US Navy uniform every work day for 7 years.

Okay backstory: I was in the US Navy. I’m not on terminal leave (literally on “vacation” until I’m officially out).

I am going to be a full time student while working on my bachelors, but I’d like more income so I have a couple of job interviews coming up.

I also have two kids, a mortgage, and enjoy maintaining some sort of social life.

Since this is the case, money is a bit tight and my savings is being used for bills until my disability and BAH (housing allowance from Post 9/11 GI Bill).

I need affordable office clothes. I know it’s frowned upon, but I’d even look for fast-fashion. I’d prefer not to do that or thrifting since I’m unsure of sizing.

I’m not sure of my exact sizes because I’m postpartum and not at my goal weight (I’m probably a large/12 pants and large/8-10 shirt(us), but I have a lot of skin and breastfeeding tittays).

Please please help me. I also hate in person shopping, but I’m open to anything at this point!

I have NOTHING in the form of presentable outfits for jobs. I’m 25 and would like to come across professional and also stylish. I also have HIPS and a booty so sizing is rough lol