From one Pisces to another, good luck! This is day 8 for me, first time doing it, and I am very glad I have been. There are some ups and downs, but mostly I just feel great that I have stuck with it this long. My main tip would be to go easy for the 10 days and give yourself time to rest. I noticed I wanted to sleep more than usual. Also, you mentioned you work in a gym. Not sure if you are planning to work out during the cleanse. Lots of people do and seem fine, but I noticed that I could only work out in the early evening. If I tried in the morning, I was way too exhausted.
Anyway, keep it going. The first few days can be tough, but I think it's worth it!