can you explain how to properly split push in bronze?

as a yorick split push main, i have no clue what i do wrong. whenever i split push, the following happens: i take tier 1 & 2 towers in both bot and top lane my team loses every team fight, then blames me for not being there at that point, taking tier 3 or inhibitor is impossible since whenever i do, they collapse on me without consequence since my team cant take objectives. moral of the story: me taking 4-6 towers does nothing when my team loses every team fight and the enemy proceeds to collapse on me

also, i would also like a few things clarified: how do i tell if the enemy team is rushing to me or taking objectives on the other side of the map when they all mia? when should i back off? when should i push is there any limit to how far i can push? how do i position wards? since i only have 2 wards(normal and control) and my team doesn't ward at all under what situations do i group or team fight? when is dying worth it? ** how do i end the game?** if 4 enemies are at base and my whole team is dead, do i base race them and hope for the best? or back and try to defend knowing i will easily get tower dived and barely delay them how do i splitpush and WIN the game when my team has no map pressure?