It sounds like you're real eager to get started and that's great.
I'd suggest renting the same type of gear you used in your class for your first few trips and doing a couple of boat dives (where you'll meet other divers) so you can see what they use and ask them why. There are so many options and a lot of reasons for one over the other. You may find 50% of the local divers to you will say "I wouldn't buy XYZ for around here."
For example, where I dive, you need a wreck reel, flashlight and safety sausage. Most of also carry a spare flashlight, game bag, lift bag, maybe a speargun or pole spear, tickle sticks, spare wreck reel, finger reel, etc. That means you need lots of attachment points. I only use 3 D-rings, one for the safety sausage, one for the spare flashlight, and one for a large brass ring that holds everything else. That works for me, and that's what I've seen other divers in my neighborhood do. So, what someone on ScubaBoard tells you might be perfect for their style of diving, may not be optimum for you.
I bought a tek BC because it looked cool in the magazines and had lots of D-Rings. Mistake. I ended up using it for about 50 dives, but never really liked it. (I'm not a tek diver). Half the D-rings were permanent and not where I wanted them, the weight pockets were uncomfortable and the BC was way too bulky.
Saw lots of other divers on the boats using BP/W and asked questions. Then I bought a BP/W with an OMS IQ harness.
Didn't like the IQ harness, but noticed quite a few divers using simple webbing, so asked about that. Made sense, was simple so I gave it a try and really ended up liking that.
Hurt my shoulder last year and now am back on the IQ harness for the extra padding it provides.
Needs change. But my point is that after 20 years I've been through 3 major equipment changes. But the gear purchased based on learning what the locals use is still with me, while the tek rig is in the closet collecting dust.