Commercial Steep Spiral Entry

I am currently working on my FAA commercial certificate and fly a C152. I am having trouble with steep spirals lately. I think the entry is where I am having trouble at. I’ve tried searching on this but I had no luck. Most resources just state that you must do the spiral not more than 60 degrees of bank and with the same radius. It does not seem to state how to enter the maneuver. I asked a few people and the answers are usually different. Some people like to enter this maneuver on the downwind and some like to enter it on the upwind. Also, there are different answers on where you should put the aiming point to start the maneuver. Some say you should put the aiming point just to the left of the left main gear, some say it should be directly over the left main gear and some say it should be to the right. To add, once you got the aiming point correctly, you should keep it in the same location to maintain the constant radius, right? I can seem to find a good illustration of this. I think this is one of the reasons why I am having trouble with this maneuver since I cannot seem to understand what I should do to complete the maneuver correctly. Any thoughts? Thanks in advance.