Welcome back!
If you're going to start scripting for RS3, botting has been made even easier thanks to Jagex. For example, if I want to deposit an inventory of absolutely anything, I can do the whole thing in two lines:
Simba Code:
bankScreen.open(BANK_CHEST_LUMBRIDGE);
bankScreen.clickButton(BANK_BUTTON_PRESET_1);
... which is obviously done with SRL-6, but stuff like bank presets and the 100% removal of random events from RS3 has made botting an absolute dream. These days, a first script will go for 10+ hours without breaking, and from what I've been told, that used to be incredibly impressive, but now it's just the norm.
You should also take a look at Oldschool RuneScape, since you may be more interested in that. If you haven't heard of it, it started off as a copy of a 2007 backup of RuneScape pre-GE but post-GWD. It has since evolved into its own game with content that RS3 doesn't have, and has managed to hold a decent population with its dedicated dev team (who legitimately care about the game). AeroLib and Lape Reflection are the most popular includes for that now, the SRL-OSR include is outdated and unmaintained and I wouldn't bother trying to use it.
That's pretty much everything. Again, welcome back!