The bathroom receptacle and microwave can't share a circuit. It's against code and in addition, it'll trip if someone is using a hair dryer at the same time as the microwave. Both draw a lot of electricity. Run separate circuits for each.

And you don't want a GFCI breaker AND a GFCI outlet on the same circuit. It's pointless and if it trips you won't know which one trips first and you'll have to reset both. I'd suggest just using a GFCI receptacle. Easier to reset if it trips instead of walking to the panel.

@greg_2015 thank you for your response. That’s what I thought might be the case. Which is simple considering I have 5 open spaces available on the main panel. So the lights on one 15amp breaker With 14-2 wire, the bathroom gfci receptacle on a 15amp Breaker with 14-2 wire, and a 20amp breaker with 12-2 wire leading the the gfci receptacle for the microwave? Could I possibly combine the bathroom gfci receptacle with the same 15amp breaker for the lights that is designated only for the bathroom?

in regards to the breaker and receptacle both being gfci protected, that makes sense. I figured doing it for both because an electricIan had did that with my last house. But I’ll just stick with the regular breaker with gfci receptacl.

I'd run a 20a circuit to the GFCI in the bathroom (I'm not sure if it's required by code, but it's a good idea if it isn't).

You can put the lights/fan on the same circuit as the receptacle. A bathroom circuit can't include non-bathroom outlets, but it can include other items in the bathroom.

Don't put the lights/fan on the 'load' side of the GFCI receptacle, because you'll be left in the dark if the GFCI trips.

I'm not sure if the dedicated microwave receptacle requires GFCI. But I guess it probably doesn't hurt.

Receptacles in bathrooms need to be on a 20A circuit (either serving only that bathroom or serving only receptacles in multiple bathrooms). That means 12-2 cable. All receptacles in bathrooms need GFCI protection.

You can neither share this circuit with the microwave (nor can the circuit serving the microwave feed bathrooms or other than kitchen areas). You'll need to run a separate circuit fo this (possibly shared with other kitchen receptacles). If it doesn't serve the countertop it doesn't need a GFCI (dedicated means nothing here, what gets you around it is that it's not on the countertop).

Thanks for the responses everyone, I really appreciate it. that answers my question so I can get started Moving forward with the project.