This question can be answered differently by various people, but in my opinion, it must've felt relieving yet confusing at the same time.
Since serfdom occurred during the Medieval period with feudalism in place, those in serfdom had to work in plots of lands for manor owners. To be freed from a life of cruel work is, for the modern age for some, to be freed from school for the summer [it's a modern day lesser extent analogy].
When you or a friend is freed from school, the first immediate reaction is relief and relaxation from the lack of need to perform hard tasks or work everyday from taking tests and doing homework. But as the summer drags on [keep in mind I'm using America's school year, it differs depending on country], students begin to get bored with nothing to occupy them. This is where the confusion kicks in for those back in the Medieval age. For them, it'll be relief and pure freedom before it kicks in that they now need a different way of income and lifestyle as for majority of their time they had been doing one job and that was serving the manor lord.
Thus, to be freed after a life of serfdom will primarily be filled with relaxation and relief and tranquility.
Hope this helps!
