I did a Master's degree while in full time employment, which took 4 years. I was so looking forward to having free time, but when it ended I was similarly lost

I did a Master's degree while in full time employment, which took 4 years. I was so looking forward to having free time, but when it ended I was similarly lost. It takes time to find your way, to socialise a bit (to find some friends even!), to do something other than just studying intensely and working. So be gentle on yourself. Allow yourself to have time that is unstructured. You will start to figure it out.