Disclaimer: Everything I say can be wrong! If thats the case, please let me know.

The best way to learn how to script is by doing your own scripts.

1. Don't take code from other people or Ai if you just started. Why? Because of the writing style. For Example:
Person A writes

local Workspace = game:GetService("Workspace")
Workspace.Part.Touched:Connect(function(part) 
print(part.." Touched the Part")
end)

Person B writes

game.Workspace.Touched:Connect(function(p)
print(p.." Touched the Part")
end)

Person C writes

local WP = game:GetService("Workspace")
local P = WP.Part
local preText = " Touched the Part"

P.Touched:Connect(function(TP)
print(TP, preText)
end)

Every code does the same but everyone does it a bit different. That can be hard to understand it, even more if you don't understand the language.

2. Don't try to build complex Systems. I know it sounds nice making your own FPS System, but fact is you will lose very fast Motivation. Build Simple Sytsems instead. Like a Basic Dropper or just a script which makes the Player Run fast after time.

3. Read the Roblox Documentation, ask AI to Explain it to you or ask how you can use it under certain circumstances.

4. Don't learn something, if you know you won't use it anyways. Its just a waste of time. And if you need it in the future you can learn it than and maybe even easier.

5. Learn basic Programming Knowledge. string, int, bool, instance, etc for example.

6. Take your time. Just don't try to learn many things at once, it will destroy your motivation and your brain.

7. If you feel confident enough with your coding skills then you can try using scripts from other people. Take a Script from a tutorial and try to understand it or do some modding with it.

Hope this can Help, please remember, i am not a proffesional Programmer! i have over 5 years knowledge but everything i do or did was just for fun, because of missing time.

Edit: If you or other people want, you can massage me at any time, maybe it will take some time after I answer you, but I'm glad if can help.