Wordpress Assistant

I have recently changed servers and a few small design issues have come up that need jigging. Some of the images and descriptions are overlapping and i need this formatting properly.

I also wish to change all of my 'buy now' buttons to be redirecting to Amazon instead.

I just need an assistant who can help me with these ad hoc tasks every now and then. Very simple tasks but i don't know how to do it.

Thank you