If you already have a spey rod then by all means try your pin reel out on it. Why not. However if you don't have a spey rod please do yourself a favor and for your next rod purchase by yourself a proper center pin rod (!)
Yes you "can" use 2-handed fly rods, or spinning rods, but there is a reason 99% of the ppl you see fishing a center pin reel have it on a proper center pin rod - it's the best tool for the job. Considering you are new to center pin casting you will enjoy it more if you use the most appropriate tool for the job.
If you walk into a fishing store and say "where are your centerpin rods?" Those ones. I realize the blank its self is simialr to a mooching blank or switch blank, or trigger rod blank. I realise you "can" put a pin reel on a spinning rod, or switch rod, or full lenght spey rod, or mooching rod, and so on. My point it the OP is new to pin casting and is having issues casting well. Therefore a rod with the cork and reel seat height designed for optimal pin casting is the best choice for a beginner.
Once you get the "easy rod" down then I would feel free to experiment with more funky options. I have pin casted with all of the above mentioned rods and they all work, but if I loan out a set up to a beginner to try it's always my fenwick HMX pin rod. 10"6, med power. Super easy to cast and get a feel for things.