Congratulations Brian.
Did mine on the 20th of July and immediately after made inquiries about the UAS Part 107 test.
Mainly to determine the cost.
Discovered, as you said, $150 .... Blimey!!!
I recall that when I wanted my drivers license in the UK I set my test date and then went to and instructor and told him "I have a driving test in 7 days, can you take me out once a day this week and have me ready?"
I passed
So, thinking about this and learning that the spots were filling up very fast I went ahead and set a date (Aug 29th was not available) for the 30th.
Started researching, self teaching and studying the material .... determined to be ready but becoming increasingly afraid I won't be .... and was horrified at what I didn't know!!!!
Very pleased at what I have learned so far, weak on charts and weather but chuffed (proud) at my understanding of METARS
Just over a week to go and beginning to stress sigh.
Wish me luck.
I will let you all know how I do.