Deathy has said he is working on a new/returning player's guide for this update, so keep an eye on his channel. I think he's one of the better educators around at the moment, particularly in terms of macro decision making (which can give you a big advantage when you're new or playing in lower ranks). While you're waiting for a more general guide, check out these videos from him:

• Guide to the laning stage (general advice + how to play when you're ahead, behind or even)
• How to be a more efficient player (very useful for mid-game, which is generally the hardest part of the game for new/lower ranked players)

In general, look for tutorials/guides/coaching sessions from December 2025 onwards, as there was a big rework to laning in late November that changed how you want to approach it.