Simple question dealing with sign conventions in KVL/KCL equations
It's a common beginner's trap, you worry too much about this ! Just pick a sign / direction that seems to make sense to you, if you have no preference or don't know, just choose any. It actually does not matter ! Because when you apply the KVL/KCL correctly and fill in the numbers, it will be positive when you have choosen correctly but negative when you have not. So worst case, you'll get a negative number meaning the (positive value) current flows in the opposite direction or the (positive value) voltage has + and - reversed.

The only thing you need to be beware of that once you choose a pos/neg or current flow direction is to stick with that choice.

Try it and you'll see it makes sense :-)