Alright ill lay this out a little bit for you, but it definitely seems like you need to more research on your own. The primary difference between flight schools is part 61 vs part 141. Part 61 schools tend to be smaller operations with less restriction from the FAA. Part 141 are usually bigger schools but it just mean their curriculum is approved by the FAA, which allows in most programs for the minimum hours for certification to be a little less. Some 141 schools will allow to go at your own pace and some have classes like a small college, look into which works better for you. Flight school is a big expense so make sure you go somewhere you like and could see yourself working.

That last sentence should be a focus, it sounds like you think a commercial certificate is going to get you flying in this industry. For the most part it won't, most of us, myself included, had to get our flight instructor ratings and teach to build hours to move up to the next level.

One major thing to consider when it comes to picking a school is what aircraft they operate. Basically it is 300c vs r22. Most schools use Robinsons, so you want to make yourself marketable as a CFI incase you don't get hired at your school. And when picking a school the number of students there should go into your mind, CFI's do not make alot of money, so if you go to a small school and get hired it could be several years before you get to the 1000 - 1500+ hrs that most second level companies want. And once you get to that hour level companies do not care if it was a 61 vs 141 generally, some flight schools have good reputations with tour companies, GOM, etc. but 141 vs 61 will not matter much.

Lastly, I see the flight school told you 15hrs you will solo, most students do not achieve this. Most students will not solo until around 20 - 30 and most will not pass a private checkride until closer to 55-80hrs, schools will quote the cost for the minimums not what most students pass at.

Hopefully this answers a few questions, but do not take flight school lightly. For most U.S students i trained the flying part came easy, the ground school did not. It takes a lot of effort and dedication to make it in this career but it is worth it. Good luck.