Hello all!  I am not a dev, but we have a team of them at my new company.  They don't want me using record triggered flows, and that is all that I have ever used.  So I have some questions about triggering flows from Apex.

My use case is mostly right now for sending out atuomated emails from a flow on cases. I have to send one when the case is opened and then I need to create some emails/notifications when cases have gone untouched.  So here are some questions I have. 

1) since I am triggering this from Apex, do I need to start with getting a record?  Or is that handled in Apex in the after update statements?  If I am kicking off a flow after update from Apex would it already have all of the data that I need from that case that was being updated same as record triggered? 

2) How would I build in a time dependency?  Is it the same as I would with record triggered?  For instance I need to say if it's been > 24 hours and the case hasn't been updated I need to notifiy someone of this.  Would I be able to build that in the same as before on the record triggered flows?  Or do I need something else in there to handle this?

Thanks in advance for any help or adivce on this.  I'm new to this format and getting very confused on what I need to do with my flows.