Like feel as if people will manipulate me easily and I do not know anything about adult things.

So I get anxious and obsessed about how to do things,

How to rent a house, do we give commission
How to go to a holiday with friends, do we pay seperate etc
How to move or how to handle moving and idk outlets
How to get a visa or passport for flight for abroad

These kind of things come to my mind and I obsessively google them with anxiety even though they are not my current problems or relevant?

Please anyone can relate?

Also any advice