How do you decide on your buy box when you're brand new?

[Reese Chappuis]

As the title suggests, I'm brand new to real estate. I'm reading and watching and listening to everything I can, and I know I need to figure out  a clear view of what my buy box is going to be. But I'm stuck at how to decide that. At this point, I'm looking at small multifamily in my state (NH) that needs some work, but I'm not able to answer "exactly what region?" or "how much work?"

And because I'm looking at places that need work, estimating rehab costs and ARV is a whole bag of worms that I don't have the experience to estimate well, so I don't believe my analyses of deals is too entirely accurate.

So is figuring out the buy box at first just a matter of finding something that looks half decent and running with it? I know I can't expect to hit a grand slam on the first one.