Welcome to pinball, but you’ve picked two of the worst games to start with...that being said, your first game will always be awesome cuz it’s your first game.
Srsly tho, I’d explore other titles. I’ve been in this hobby for ~15 years & GB is hands down the worst game I’ve ever played in my life. Just absolutely terrible design, Huge flipper gap, unfair airballs, cheap drains and bounce-outs...it’s just unfun. Code does not save it. It’s still goofy. Plus, as mentioned - designed by a disgusting pedophile.
Stranger Things is new & underbaked.
If you’re leaning toward a newer Stern with a family friendly theme, go with Jurassic Park. Truly a great game.