Without responding with respect to your zoning and what is allowed locally, I will discuss what is allowed on state level because i believe it will allow what you seek.In 2025 SB 1211 (Skinner) – Multi-Family goes into effect allows an ADU (I think it specifies detached but question if that is a requirement) for each legal non ADU unit up to 8 units.  

Just like everything else in life, get started, keep honing those skills (i.e. keep reading, keep learning, keep attending the meetups) and watch yourself get better and better witch each property you buy.I hope this helps and good luck on your real estate journey!

If they don't specialize in a certain skill, they know someone who does.

Active or even passive management of real estate could be cumbersome for many heirs, not skilled in it. 

If you are in a relationship and want to invest, there is one thing you must be sure of before you start your journey.You have to be on the same page about real estate investing.Almost every story of a successful investor has a cooperative partnership and agreed view on investing as a couple (and a plan for the kids if they have them).Both parties don't have to have the same level of involvement.

I do know that the pricing varies based on the unit count as well as what level you sign up for; but overall, it's super user-friendly for tenants, PM's & owners.Plus they're always updating their software and adding new automation features to make everything so simple as well as well as great customer support. 

If anyone has recommendations for free resources—whether it’s books, websites, videos, or anything else that could help me sharpen my skills—I’d really appreciate it.

Self-management is a good thing, as long as you have the skill set and knowledge to do it properly.

Real estate requires a certain set of knowledge, skills, and abilities.

This gives you an additional level of liability protection.