Hello I will help you with your question,
The power steering pump pulley is what is blocking you. I wrap a chain or strap wrench around it to hold while I remove the nut. The pulley will come off the shaft once the nut is removed.
Strap wrenches are about $5 - 10 at your local home center.
Chain wrenches are available at Harbor Freight and the othert cheap tool stores.
Let me know what I can do to help you with this