Help with essay for an SI Graduate Program

Hello Members!

I'm hoping, if appropriate, if anyone could provide some guidance with writing entrance essays for these programs. I have a BS in Biology and minor in Art Studio and after working in labs for a few years, I feel scientific illustration is what I want to do and it'd be a career change for me. 

Except that I can't tell if saying something along those lines sounds cliche.

Any advice would be greatly appreciated.

Thanks for your time,

~h