@Jimmy Ready
1) No, it's not a good idea. It's a great idea. I bought a duplex as my first home and it was a tremendous move. Just be sure to familiarize yourself with the rental laws and rental market. Also, some may say to put the 20% down but I think if you can do 5% or less, go for it. You will have to pay PMI but that is spread out and paid for by your tenant. Spending so much money upfront limits what you can do going forward.
2) Best advice is that if you limit your thinking, you'll always have limited results. Don't be afraid to take risks or non-traditional paths. Most people will tell you why they wouldn't be a landlord or invest their retirement account into a property, and these are the people who are hoping to retire at 65 if the stock market allows.
3) Dear 25-year old me, get invested in something! Learn about the many ways you can make money beyond a paycheck. Yes, this includes stocks, real estate, freelancing, self-publishing on Amazon, etc.