Stevepunk

I'd like to have a complex intersection of 12+ blocks with at least 5 trains.

I'm new to Lego (but played plenty of Factorio) so used to dividing tracks into blocks to automate trains. Are there any tutorials? What hardware do I need? Does this work with Bluetooth 5.0? I understand how the PC would talk to powered up hubs as they're bluetooth, but aren't prior devices infrared? How would they communicate? eg. Powerfunctions, sbrick, wedo.. Can I increase the amount to junctions searched forward above 2 with code (for complex intersections), or is it a hard limit? What are the best sensors/hubs/auto switches (or motors) to buy in bulk if I'm starting from scratch? Currently looking at powered up trains as they can be stopped individually by Bluetooth and it's easier to cut plastic track than metal, but if there's a limit of 5 hubs can I only have 5 trains and no sensors/switches?