Dragon Ball: Another Timeline

[No plot railroading, no system, no instant godlike power at the start, other transmigrators may appear! Fast-paced plot, no dragging!] Transmigrating into the Dragon Ball world, my cheat ability is becoming another Saiyan with the legendary Super Saiyan bloodline. A decent start, I fantasized about soon punching Frieza and kicking Beerus, but I never expected this timeline to be wrong. Is Zamasu present in the iconic first Super Saiyan transformation of Goku? Real and fake Goku? Isn't the Galactic Soldier appearing a bit too early? Majin Buu absorbing Janemba? Cell fusing with the legendary Super Saiyan cells? Jiren also transforming? ... The enemies are too strong; Super Saiyan Blue Gogeta can't win, Super Saiyan 4 Gogeta can't win either, so let's try Super Saiyan 4 Blue Gogeta!