This initial negative equity position consumes the initial cash flow.  2) the addition of the adu makes the property multi family and likely makes rent control apply.  

I've been informed that completing the course alone may not be sufficient to pass the exam, so I’m seeking advice on how to prepare effectively once I complete it.Currently, my only other resources include a YouTube video, five practice exams, and a textbook.If you have any additional suggestions—whether online or in-person, paid or free—that could help me effectively prepare for the exam, I would greatly appreciate them.

Your best route might be to buy a 2 to 4 unit property that you can live in and rent out the additional apartments.

In most single family zoned areas adding a single ADU is not a value add meaning it will not add more value than the hands off cost of the addition.  

Additionally, I really want to dive into the property management realm and am passionate about connecting and assisting other Veterans and Active Duty. 

What would be my best route to take if we need additional finances?

Quote from @Lisa Albright: Hi All,Newbie here, just a quick question we are building an addition on our second home, we have a primary residence, and two rental properties.

Principal balance currently at 314kProperty Details: It's essentially a "2-in-1" property, with the main unit rented out for $1,900/month and an attached ADU bringing in an additional $1,200/month.

Yes, I’ll check with regional building, but curious for additional thoughts here.

But this comes with pockets of C/D neighborhoods, and higher potential for headaches;  in addition, appreciation in these zips has probably maxed out for a while.