I typically boil to about 265 and take it off the stove and immediately stir and don't stop until it is very dry powder. I also start stirring in the dish while it is cooking at about 240 degrees until it reaches the desired temperature so that it won't burn down. I then put it thru a screen to take out the larger pieces.
I would work with smaller amounts until you get use to it. If you have or have access to a commercial mixer, they work very well. From experience, cheap Walmart mixers don't work well, as I have had to say sorry honey a couple times.
Success is not final,failure is not fatal.It is courage to continue that really counts
“I have not failed. I’ve just found 10,000 ways that won’t work.”
– Thomas Edison