This is what you searched for. If you want to skip the tutorial and start playing God of the Job Site, you need mods.
Level mods can sometimes glitch the tutorial sequence if activated too early. construction simulator 3 mod level max top
Use the "Level Max Top" mod on a second save slot. Keep your main save legit for when you want a relaxing grind. Use the modded save for when you just want to bulldoze a forest for fun. This is what you searched for