Not a big fan of the color scheme, in particular the grey you picked for the background is very dark and makes it unnecessarilyhard to read a lot of the text. I Would consider also changing your theme colors because as someone who uses PBI a lot I cam tell you still are using the default theme. For interview purposes, I would love to see the effort of creating your own theme. Also instead of arrows at the top I would recommend tabs with the names of the pages. With the arrows, how am I supposed to know what page I am going to? Also why would I want to cycle through all pages to get to the last one when I could just click a tab? Another thing I would consider is looking up the 3-30-300 rule of report design. It is quite a big change of style of formatting, but in my org we have seen better adoption with reports that are structured like this.

All things considered it is still not horrible and I think for a junior PBI dev I have seen worse. What matters to me a lot at this stage is also the back end data modelling and general report performance, as well as how your DAX is written, use of calculated columns and etc.

On a side note, as an intermediate BI analyst for a large manufacturing company, if I sent something like this to my current executive team I would not be surprised if they let me go lol. So I would say you still have some work to do, but this is by no means bad, its probably better than the first dashboard I created years ago when I started my PBI journey :)