Some people have very little side effects, some have a ton. Some people respond very strongly immediately, some people need to titrate up. Keep an eye on what you eat and the scale. You may need to go up, or you may react well to a small dose and lose weight without side effects. Go slow and see what happens. If there isn't much difference by your fourth week, go up in dose.
I started with sema and had zero side effects with the minimum dose and all the benefits. I eventually moved to every 5-6 days instead of 7, then half the minimum dose 2-3 times a week based on how I felt. The benefit of grey is you're completely in control of your doses and schedule. Smaller doses more frequently makes me have the benefits with almost no side effects at all.