On Friday I'm starting my first job in an IT firm as an analyst and I'm lost at what to wear. For the interview I wore black dress and nude heels. I don't really want to wear the same outfit, especially if the weather decides to be too ugly for nude shoes. However, I have nothing else to wear, so it is my backup.

At the interview, I got an impression of a clean casual look within the firm. I'm talking a button up shirt tucked in jeans look.

I have black jeans (because any dress pants I put on in shops looked like jeans or sweats on me anyway), but I don't know what to pair it with. I can't really wear shirts because I have large breasts and can't find any that wouldn't be both small and large at the same time.

I was hoping for a look like this, but I ended up not buying the shirt, because it seemed large even though it barely fit. I always wanted a bright pink shirt with black jeans, but I'll have to find a good seamstress first.

I don't have any blazers, because I can't close the buttons.

I'm going to go hunting for some tops tomorrow, but I haven't seen anything at the shops I'd be willing to spend a day in. I might make an exception for the first day and buy a polyester top, but I'm still in need of some office clothes.

I don't know where to look for inspiration and I hate shopping. I've been going to malls these past months with hopes of something speaking to me, but I had no luck. Now I'm in a dire need of clothes and I hate everything they sell. It's all either some uncomfortable fabric, wrong look, wrong fit or black (I don't want them to think I'm some gothic wannabe like they thought in highschool).

Can you help me find some comfortable clothes for my first day at work? I don't really have options now, I'll have to buy the top or some new dress.

Edit:

This was another look I was trying to pull, but it didn't work either. The dress pants looked like leggings and creased at the knee. I couldn't comfortably close the jacket and the blouse looked bad without the jacket :/ larger jacket was only available online, but it would be too large.

I've been trying hard to find some proper pants, but they're all stretchy, which doesn't work for me :/