I'd really like to try it, but I hear that the long sitting can be excruciatingly painful on your lower-back/back-side (and I'm a big guy!) And a lot of people quit the 10-day because of it. I do 10-15mins of meditation every day, but typically sitting in a chair or laying down - never sitting "cross-legged". Today, the max I can sit "cross-legged" on a yoga-mat is around 20-25 minutes - then my legs fall asleep and my back starts to ache quite bad. Would love to do a 10-day though if my body could handle it....
It's definitely no mean feat! The first 2/3 days are very physically intense. Then after that the psychological pain arrives and lasts another couple of days. Lots of people leave during this time. It's tough. But if you can push through it the light at the end is game changing. Sounds like you're doing the right thing though. Practice sitting a little each day, it gets easier. And get yourself signed up 😁👏
Also, if you have health issues which prevent you sitting cross legged some are allowed chairs to sit on.