Hello, welcome to TFL. We're here to help in any way we can.
I decided to start playing around with reloading for the heck of it.
Yes, that raised an eyebrow with me too. But we can't read tone through the written word, so I'll brush it aside - kind of. Loading your own ammo can be highly rewarding. For many, it becomes a craft and hobby in and of itself (I, for one). But please approach all handloading endeavors with a great deal of caution and respect for that fact that you are basically making little bombs. It's not something with which to take a cavalier approach.
You need to thoroughly read a manual. Hornady's was mentioned. Yes, that's a good choice. So is Speer (my personal recommendation).
As also mentioned, 9mm is a small case. Which means relatively small mistakes can potentially yield big negative results. 9mm is a bit persnikity and not the best choice for beginners. But if that's what you have, then that's what you have.
Power Pistol happens to be highly energetic (and happens to be one of my favorite propellants - but more detail on that some other time). That means it's less forgiving than other more lackadaisical propellants (like HS-6 or AA#5). I would discourage folks new to loading to start with Power Pistol. I have no experience with Sport Pistol, but I understand that it has a pretty fast burn rate. Still not a good choice for a beginner.
147 grain bullets are heavy for caliber. That means that small changes in propellant charge weight can yield big changes in pressure. They become particularly unforgiving with fast powders (like Sport Pistol, maybe?).
So we have someone new to handloading; loading a small case, with an energetic and/or fast propellant, and heavy bullets. See our concern? This would be a really good time to make sure you have all your ducks in a row. The second thing I would recommend (reading the manual being the first) is getting some 115 grain bullets to start with. The lighter bullet buys some loading error forgiveness. Not to mention that they would be a better "balanced" choice for Sport Pistol (I believe, again, I have no direct experience with it.). With 115's, I would be more comfortable guiding a new loader along who is using Power Pistol. 147's, not so much.