Lost in the process of finding a job : how should I prepare myself after a 6 months break?

Hello! So I’ve been unemployed for 6 months and I haven’t studied anything or done any project in this period of time (I was depressed). Now I’m finally finding the motivation to look for a job and apply again but I’m scared of not being able to do my job anymore and to have lost my knowledge and skills.

Before that I worked for 6 months as a data scientist and for 1 year as a data analyst. I also got a Master degree in the field so I do have some basic knowledge but I really don’t remember much anymore.

How would you do to get yourself ready for interviews after spending that much time without studying and coding? Would it be fine for me to already start applying or should I make sure to get some knowledge back first?

Thanks for your help!