First, welcome to the hobby and you are making a great choice.
I use Hobbylinc out of Georgia to order from which has the best prices I've found and are always dependable, and occasionally I use Spruebrothers which ships quite fast.
I use a lot of Tamiya products myself to include
Paints what ever kind you choose to use. I use Tamiya Acrylics for spraying, getting ready to get a different brand for brushing since I'm slowly starting to get into armor and figure painting for dioramas.
Extra thin cement green lid
Regular cement orange lid
Masking tape
Paint brushes
cutting tools like nippers
Sanding supplies
Etc. etc. etc. the etc's are like the energizer bunny, they just keep going and going.
Air Brush and compressor ( not required but sure does make one heck of a difference) If you go AirBrush just don't start a thread asking what to buy. Too many answers flow your way and there are already plenty of threads to read on that.
paint booth (for Airbrush and you can build your own, you don't have to buy one)
Most important of all decide what you are going to build and by one or two kits. Tamiya kits are the most trouble free kits and they have some inexpensive older kits that are good to start back up with. That is if you are doing Armor or Aircraft.
OR do like I did, I just went out and bought the things that I remembered from my youth and built the beginning models the way I used to. Then I started adding supplies to use other techniques. It really all depends on how you want to go and how much you want to spend right off the bat.
Unless you have lot's of space to waste and money to spend, avoid the desire to become a kit collector. The urge is strong and it's a daily struggle because there are kits that in your mind you will think, I just have to have that kit. A few years later it's still collecting dust in a box and taking up needed space along with all the other I just have to haves.