It says on your profile that you have maybe 24 dives under your belt. If that's correct, I'd personally hold off on dry suit diving in warm water until you find the right wet suit combination. I've done A LOT of diving in Florida and I'm a super thin and light weight guy who hates being cold. On more shallow dives (80 feet) I had no problem with wearing a .5 skin and then a 5mm suit on top. I even wear a 3mm hood and gloves. You won't get really wet, in fact it's so hot on the boats most of the time you dry off before you can get a towel. I use to pull down the zipper on my suit and within 5 minutes, be toasty warm again and ready to get back in, even in winter.
Now, with deeper and longer duration (below recreational limit) diving, there is absolutely a need for dry suits due to fatigue. However, with recreational diving, especially with OW students (max 60 feet), it's never a problem.
If you plan on being a DM, you will never wear a dry suit because your job is to get into the water, find the site, tie the line off and organize the boat. This is really difficult to do with a dry suit on, you will get ultra hot and find it difficult to do the surface part of the job. Plus since you'll be in and out of the water, with and without SCUBA gear all day, you need that dexterity and ability to pee in your suit because you won't have time to take a bathroom break on most jobs. I use to teach in a dry suit in the north east where water temp's averaged low 50's, high 40's. I didn't have a choice because I got too cold in a wet suit. It wasn't about getting wet, it was literally about thermal protection. However, the DM's on those boats were all wearing wet suits, even though everyone else was in drysuits.
In terms of finding the right drysuit, there are two basic types; trash bag and thermal protected.
Trash bag suits offer zero thermal protection. These are made of laminate and/or natural rubber. What keeps you warm is a thin layer of air between your skin and the suit. This layer is generally controlled by undergarments you wear, rather then simply how much air you add to the suit.
Thermal protected suits are usually made of neoprene just like a wet suit and inherently offer substantial thermal protection.
Trash bag suits are designed to fit bulky, so they have a lot of drag when swimming. The bulkiness is to allow for layers of thermal protection, which is the only way you'll be warm. When you add layers, you also make the suit more positively buoyant (due to adding more air gap), requiring more weight to get down.
Thermal protected suits fit tight, they have less drag under water and for places like Florida, you won't need any undergarment. So you could theoretically have someone cut the suit to fit even tighter then normal.
I've had Trilam, Rubber and Neoprene suits. I vastly prefer neoprene because if anything happens, leak or seal failure, you still have thermal protection of some kind. Plus, neoprene is a robust material, a high quality neoprene suit will last you decades, where laminate suits glue tends to fall apart over time. As an instructor, I also want a suit I can don and doff quickly without any help. It took me a long time to find the right suit (link below) but there are many companies who make them today. Really easy to deal with, easy to clean and very comfortable for long dives.
Anyway, that's my .02 cents on the matter. You'll hear arguments from both camp's, the laminate camp and the neoprene camp. You should try a dry suit first, learn how it effects your buoyancy control and maybe you'll change your mind. For me, in Florida, I would never wear a drysuit with students. But that's me and maybe you have other reasons to have a drysuit that we don't know of, but a good wetsuit should be something to try before making the switch.
https://www.youtube.com/watch?v=HkJrckGig7Y
