Welcome to BP! Addressing your points below:
1) how do you know what strategy to try first? I am definitely drawn to house hacking bc of the house rental prices in Seattle area. Would you advise the first deal be in state or out of state? Why?
Brandon and David especially recommend starting out househacking because it allows you to wear a ton of different hats at once. You get to be involved in the process of purchasing a home, tenant screening, creating lease agreements, working on minor repair work, creating a network of contractors, etc.
With all that being said, househacking is great because you can qualify for a government assistance loan (anywhere from 3-20% down) since you will be living in one of the units (or one of the rooms if it is a single family home).
I would highly advise your first property purchase to be in-state, preferably in an area you consider your "backyard." It's way better to make mistakes in your local sandbox then in the middle of a highway.
2) A friend advised me to go to a loan officer to see what I can qualify for. Should I do this before I have my strategy figured out? If I get my pre-approval, how much time do I have before I have to find my "deal"? And does this work for out of state?
Nothing hurts with getting the opinion of a loan officer. Typically they don't run a hard pull on your credit, so it won't affect your credit score. Typically pre-approvals are good for 60-90 days depending on the lender.
A lot of lenders nowadays service multiple states, but again, I cannot stress the importance in investing in an area you are familiar with. If that area happens to be out of state, go for it, but if you don't plan to live there, you legally would not qualify for a low down payment option.