And redoing the battle system is NOT a task that should be at the top of your list when you are just learning scripting

That would have to be about the most difficult script to mod of all of them.
LOL when people were talking about some of their first script projects in another thread, I refrained from posting that my first script was a quest journal that worked but was too hard for most people to use, but my second was RSSBS.
Obviously I wasn't just learning scripting (only Ruby and RGSS3). I guess my point is that you could start with a battle system mod if you wanted. It doesn't have to be a good mod LOL. It actually can take very little code to put simple actors on the screen as I believe is shown in one of the early battle mods for ACE. Even the first spin of RSSBS was fairly short and easy before it got fancy and full of options.
Anyway, I also wanted to add that due to the large number of requests of this nature that I've seen, I'm working on a fairly detailed "how to get started" article which will provide the necessary Ruby crash course and then introduce some of the most common RGSS3 scripting principles. After that I may add more articles or turn it into a discussion thread (Shaz, please PM me with your suggestions on how best to handle this). I'm about 60% complete with the first article now, so in a day or so I'd imagine I'll have it ready to post.
@WNxTyr4el: you can expect a larger, more in-depth (but hopefully as entertaining) version of the mail I sent you.