I'd suggest something akin to a Beseler PM2L color meter. They work great for B&W or color and can be found easily on eBay and other places. It is such an important tool to me that I bought a spare. Search "Beseler pm".
Essentially the role of any meter for the enlarger is to mimic the papers response to a given input. It allows you to spot meter for your print. That means you can measure contrast, expose the paper to black or white or any other point you might prefer.
Meters aren't magic bullets; there is a learning curve but as you get the hang of it you'll start to see what it's telling you and what the negative in the holder is going to give you.
What meters do is allow repeatability/predictability. Over time you will define and refine the "programming" (setting the dials) of the meter and be able to print very nice proofs on the first try. With the paper iso numbers and a little math you can even switch paper and get close.
One thing that works really well for me is incident metering my subject, then shooting a reference shot of the incident meter in the same light as my subject during the session. I use black, white, and grey points on the meter from the reference shot to set the enlarger then just insert the negative I want to print in place of the reference shot and I'm ready. Same basic process for both B&W or color.