Ok, I’ve read all this and I go back to my original post concerning programming in one or two local police or fire frequencies to see how they work after reading the manual. This should take just a few minutes. Have you done this? Then as mentioned proceed to Chirp for setting up more.
No, this hobby is not simple and requires time and much patience. It is not for everyone. As you say, you are overwhelmed and frustrated which I understand. However, life is too short to continue this if it causes ongoing frustration.
Please do not take this the wrong way, but you may find this is not for you.
Many here have given good advice but you mainly have to assess the reasons you really want to pursue this. I hope you do since the ultimate goal is happiness but do not let it stress you.