How to shell script for noob? or Cryptography for someone who doesn't need.

Hi, I've seen the need of automating some tasks in the Terminal and I believe using shell scripts is my solution, although I don't really even understand how they work.
Instead of posting a full how-to here, I'd like to ask if anyone knows about good comprehensive guide for someone who never used any programming language, yet knows how to work a bit with the Terminal?
I will figure out the command I will need to input in the Terminal myself, by testing. Once it's figured all I need is to make a shell script out of it, and perhaps make an application out of it. (Automator? ... or more Script Editor? Or?)
Thanks
After seing this page...
http://www.askdavetaylor.com/howcan_i_secure_encrypt_folders_on_my_macs_usb_flashdrive.html
... I believed to have found a great solution for some heavy cryptography, to protect some folder and for learning pleasure. What I wanted to do is to automate the openssl task mostly like this:
Open my flash drive (or a certain folder) containting a disk image (uncompressed, or compressed if necessary, doesn't matter) but uncrypted. Clicking on something I will name 'Lock' for the moment will run the shell script, encrypting the said image with pre-set parameters and a password I will input when prompted by the app.
Re-running the app will prompt me a password and simply un-encrypt the image, making it useable for me.
That's all. Perhaps if I can do it, I'll make it prompt me what cipher and all other parameter to use, but I don't understand openssl very well yet. *I just read and understood more or less informations on that page.*
Who knows, I'll end up with a sweet GUI for encrypting files usable by the common mortals.

The Advanced Bash Scripting Guide is a great resource for beginners thru advanced users- http://tldp.org/LDP/abs/html/index.html

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user8744860 wrote:
I am facing a difficulty . . . Etc . . .
I want to execute the above in shell script. how to manage this?
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1) What you posted is not a shell script.
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as well as the expected result from that data. Provide also an explanation of the rules that lead to this result.
3) Also provide any code you have written.
:p

How to shell script for noob? or Cryptography for someone who doesn't need.

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