Finding Base + Offset in OllyDbg

Hi everyone. I am trying to learn how to find bases and offsets for an old FPS game that has never been hacked before. I found a string like, "fReloadTime", and I am trying to make instant reload by writing a new value to it. So the question is, what should I do in order to get the base and offset? Please help, thank you for your time and consideration.

it is string nothing much, you have to go into the operand to see what is the method calling this offset. then you have to read it reverse way so you can put them into c++.

It's easier just to change Aob if HS doesn't detect it (some hacks don't get detected).As for the Pointer,you have to see what writes to that address you're looking for.