RichieSteel,,
I too have returned to riding and, WOW, have things changed since I abandoned my Schwinn LeTour in 1983. So, I am also trying to climb this very vertical learning curve on modern day cycles. Hey, the new technology is great!!
My current ride is a inexpensive GMC Denali that I bought via Amazon. Didn't want to invest a lot of $$ until I knew I was going to stick to riding again. Well, five months and 1,164 miles later I'm hooked. Gotta say also a lot of upgrades to the Denali (POS). Tires and tubes were the first.
As a returning 'newbie' I'd strongly suggest replacing the tires and tubes that came with the bike. Hey,,, yo butt is ridding on that thin line above those tires.
Just my humble input..... Have fun and remember pedal pressure equates to forward motion....