I'm currently analyzing deals, and this summer will go with my father to get pre-qualified for a mortgage.

REIN and TNREIA are two very popular meetups around here and will help you get connected in the investor community.

I would seriously look at Airbnb Potential when analyzing properties.

Maybe get a mentor from the REI groupBuild a team in that area (real estate agent that specializes in investment RE and is an investor themselves, lender, title company, contractors, property manager)Get on wholesalers listsSet up an auto search list with your agentStart analyzing dealsMake offersBuy a property and repeatHappy Investing!

I have been browsing the most popular real estate mentors online.

I don't see that you analyzed the cost of owning the property, only the cost of buying. 

I think you're best bet is to learn how to properly analyze multi properties, then find one that you can take down with a partner.

I have been analyzing STR and using free AirDNA along with some tables that I was sent based on past years from AirDNA.  

It's not really helping you on your main goal, if anything it's distracting you and taking time away while you could be educating yourself on analyzing deals/property management, or making money as a handyman to fund that first deal! 

Here recently I have been analyzing properties and finding deals.