Any good guides for what each position should be doing at various points of the game?

New-ish player here who is struggling to find good guides that aren't out of date. I'm still trying to get a feel for what position I want to main but I'm having a hard time understanding what I should actually be doing at various points of the game. P1 I can just farm most of the game and be useful. P2 i'm not interested in. 3-5 though I feel clueless in a ton of different situations.

Like I just played a P5 game. Our lane was doing poorly and P1 went to jungle. What should I have been doing? I tried staying in lane and would get dived. Both T1 towers were up in mid so I didn't feel like I could help gank. Top lane was shoved into enemy tower and I felt the same way about being unable to gank. So what should I have been doing?

And I have the same questions about 3/4. Basically, i'd love a guide that was like:

You're P5. P1 is going to jungle. If winning lane and top/mid are losing, do V. If winning lane and top/mid are winning do W. If losing lane and top/mid are losing, do X. If losing and top/mid are winning do Y etc.

I know there's more factors to consider than just that but as a new player I feel like a lot of the time i'm standing around waiting for the team to start grouping up so I know what i should do. I just need something basic to get me started for each position. I've tried watching videos focusing on specific roles but i'm really struggling to find good videos that the level of knowledge I have.