Most problems are caused by your subconscious, it's a jerk.

The first few nights you will not sleep well, because no matter how tiered you are, you subconscious will be sooo excited and won't want to miss any of it. When you do close your eye and drift off into the best sleep ever, your subconscious will feel that very slight sway of the hammock, and exaggerate it and panic "Help we're going to fall"

You will probably also toss and turn a lot - your subconscious says oooh this is sooo comfortable .... but if I turn just a weeny bit ...

Before you start plan carefully where to put everything, you can't just tuck it under your pillow - it won't stay there. Empty you pockets as well, or they do it for you.

When you get up in the middle of the night, if you stand up too fast and make yourself dizzy, leaning on the hammock might not be your best plan.

Practising "bedding control" before hand would be a good idea, but you will still wake up to a cascade to bedding making its way too the ground.

There is plenty more too learn, and I'm sure folks will add many more, but have fun finding It's still waaay better than a bed