I am a Realtor in Northern Virginia but through my personal investing and my website I have a feel for several markets around the country. Jacksonville is one. My opinion (from hundreds of miles away) is that it would be a very, very hard one to get started in at this time.
Jacksonville, Like Charlotte and several other markets around the country is being overrun by corporate investors. It is extremely hard for the mom and pop investor whether new or experienced to find a deal there. Almost certainly a new investor will not find anything on the MLS and while there are always off market deals, a new investor getting to the front of that line will also be hard.
And, last, as @Brett Nissen said, investor oriented Realtors in his market are extremely busy. They just don't have the time to hold the hand of a first timer. Nothing against the Jacksonville Realtors but as a Realtor, myself, I know that in this low inventory environment, you need to make multiple offers before your buyer, occupant or investor, lands a home. We only have so much time.
So give up or wait until the market cools? Absolutely not!!!!!
Just go to a different market.
My understanding is that some of the markets in Georgia, while still hot, give a buyer a chance to think. While that area is close to you, there are many other places around the country that are slower than Jacksonville right now. If you factor in property management and the numbers still work, go for it!
A personal example.
Last year I saw that the Charlotte market was exploding. I decided that I would sell my entry level detached home investment there. We got 15 offers. 10 were corporate offers (cash), 3 were mom and pop investors (financed) and 2 were owner occupants.
The mom and pop investors were out. If I was selling to an investor, I was going to go all cash. Even if mom and pop were a thousand or two higher, I would go cash.
But because I believe in individual home ownership and as an act of charity, I went back to the highest priced owner occupant and asked them to raise their offer to a bit less than the best corporate cash offer AND waive the appraisal. (No way it would appraise at these lofty numbers.) They could not waive the appraisal (no cash to make up a shortfall), so I sold to the corporate buyer.
I then took that money to Fayetteville, a great cash flow market. Fayetteville is still super hot but you have a little more opportunity to think.
I suggest the same to you. You need a market where you can buy and have confidence you made a good choice. An experienced investor can decide in two minutes if a property will work. Whether it does or does not, they will not have serious regrets. They know they will make a mistake here or there. But a new investor forced to make a hasty decision will often be filled with self doubt and that is not a way to start this journey.
Just one guy's thoughts.