I'd say if starting fresh, to just start a new character entirely. The tutorial for all skills will give you a solid foundational understanding of how the game works now & generally what you are going to need down the line.
FatalSilence made some great pointers but I'd say gear as such is not as necessary as learning the games foundations, which would most easily be done by just restarting.
There are also a ton of resources on the RS Wiki, which is now directly accessible in-game in the chat bar, by clicking the "RS Wiki" button followed by typing the information you want to know.
The community in-game isn't like it once was however, no one really chats. Asking for help in-game may be more challenging than it used to be.