Help with Network at Work

[armandopenv]

Hello everyone, new to the forums here. 

I have to admit I might be out of my wheel house here, my family has a fertilizer company in Mexico and are building a new factory. I dumbly admittedly boasted that I could take are of all the networking side of things along with installing the security cameras and such. Im no expert and don't intend on pretending that I completely know what I am doing. I do have pretty good knowledge on moderate networking. I ordered a bunch of stuff along with security cameras and a NAS that is meant to run the security IP cameras. I made a network topology map that is sort of supposed to explain what I plan on doing. We will be handling a bunch of important information and was looking at the only option that I have for purchase here in Mexico is either a firewall from TPLINK ER7206, and a FORTINET system with a licensing thing. I'm fine with paying extra for the added security if you guys think it's worth it. I will attach the things that I have bought so far and the map (really ugly drawn in a free app) and I would appreciate ANY comment to help me out. Just to see if I'm sorta on the right track or if I'm going to completely derail the whole company and have spent a whole bunch of money for nothing. Using CAT6+ for everything and Fiber to connect in between buildings, there's 3 main buildings. The main office where internet is going to be coming from (has to be Starlink, no other providers that far out of the city), a security office about 100 Meters away from the office that will be connecting 4 cameras in that given switch, and a switch in the main production building that is also connected by Fiber that is about 150 meters away from the office. 

Anyway thanks in advance for any help. 

p.s. the pictures with the orders are in Spanish but they give a pretty good explanation of what it is and its SKU´s. (sorry)