Welcome Big John
Couple things that will help you now before you get started,
Apply online for the PERKS cards from Petro, Pilot, Flying J, Road Ranger, T/A youll decide on where you like to go, But youll find yourself in parts of the country youll have to use someone else, might as well get the free showers, Meals Points etc...
If you dont have a Smartphone and Headset, Bluetooth device get one, download the TRUCK STOP APPS, CAT SCALE, Navigation/GPS etc...Weather apps all will come in handy,
TRUCKERS ATLAS, Even if you have the phone, GPS theres LOTS of valuable info and GPS is not 100% every day...get the Laminated version.
Id recommend you Join OOIDA, its a great orginization and is very helpful and services and such are affordable, OOIDA Fuel card is a good one thru Fleet One gives you access to Cash advances, ATM usage, etc.
Get online and find the FED EX KINKOS Locations and keep it in your briefcase, its cheaper to send Bills/fax's etc from Fed ex or Mailboxes to go, or any Mail/Shipping service then the truckstop. Also APPS for this.
PERKS CARDS from Restaurants like Subway, Famous Daves etc can save ya a few bucks and get ya a free meal, Same can be said for Motel/Hotel chains, you can go online and join the PERKS clubs, Days Inn, Red Roof have served me well.
ALWAYS keep some reserve CASH in your pocket, tolls pop up or other issues where you need cash, and be sure your ATM card will work in a Nationwide netowrk, Cirrus, Star etc...if your going thru Chicago, upper midwest, NEW YORK then a Pre Pass/ EZ Pass is essential
Always keep some reserve cash in the bank for Breakdowns, Tires etc, Most companies will assist with this and take from your pay if your on a load, keep all reciepts/Copys etc and make copies for yourself. Your going to want a good briefcase with pockets for filing and storing, I have two Notebooks with File sections I use for Logs, Reciepts, Inspection reports, Tolls, Oil/Fuel/Windshield washer fluid, wipers, etc etc etc...
Order in advance from Cargo Control any needed straps, load bars or cargo straps etc, they can be overpriced on the road...
Now I wish you the best on finding companies to work for, JD Clark has been good to me, it really depends on what you want to do, where you want to haul, How much your willing to endure on the road 2-3 weeks etc.....
Most of all Be Safe, Look Twice, and watch out for the other guy
Good Luck to you !!!!