@Nicholas Bossert my condolences on your mothers passing, and also congrats to you for savvy thinking as a beginning investor. First of all, slow down! I agree with the others that you should finish the house hack that you've started. One, it gives you credibility and the learning experience is invaluable. Two, it's an asset free & clear of sentimentality.
The red flag that stood out to me is "...I love this house..." When I got into this game, it was hammered into me by a mentor that you must fall in love with the numbers, not the property, or the architecture, or the fact that it reminds you of your Nana's house. I get it -- I really do. But fall in love with the numbers and make your decision that way. Now, have I chosen some properties based on other factors than just numbers? Yes. Such as quality of structure, location, fitting our business model, etc. But in all of those cases, the numbers worked first.
I agree with an above point about showing your dad a successful investment through your house hack, then go from there. Showing someone how something works is often more powerful than explaining it.