Perhaps someone else will be able to provide you with first-hand knowledge, but this link (and the links that it provides) may be a good place to start. 

Some investors also use a business line of credit backed by their cash flow, which can help with future deals.If you’re planning to scale, maybe start stacking that cash for the next property or even park some in T-bills for short-term returns.

Quote from @Meghan McCollum: Hello everyone, I'm looking to start my journey of investing in Duluth, MN.

Thought I could set up an SDIRA and use this to get started.

It's a far better starting point for a new investor slowly growing a portfolio.You can learn more about that here on a Bigger Pocket Podcasts and here, and here is an article on it too. 

I got my license as an agent and have done a lot to learn as much as possible about the market I'm in and the real estate world in general.I am working with one investor currently, building a plan to start spec building in the new year, with a few other ideas as well.I'm excited to meet like minded people on this forum!

Start with BiggerPockets Ultimate Beginners Guide (free).

You can start by not calling us Boomers, lol.

Currently started renting it for 2300$ per month , need your suggestion things I can do to fix my below situation. 

Getting an LLC in place from the start can provide peace of mind and give you a chance to familiarize yourself with the process before expanding your portfolio.