As someone who's been driving for over 25 years, I believe you made a good call (continuing on through the lights). This is what the amber light is for, so you don't have to suddenly hit the breaks. As I say to my teenage kids 'Better to go through the amber light in a straight line than hit the breaks and go through the intersection out of control, after you've slammed on the breaks'.
Believe me, learning to trust the calls you make comes with experience. You will learn to trust yourself. Part of that trust also involves making calls when it comes to avoiding unnecessary stress. There are still intersections I avoid because they're acknowledged by many as being incredibly stressful. I occasionally figure what's the point of entering into a completely unnecessary challenge.
Keep in mind, there's a massive amount of information for the brain to take in when you drive. Until the brain is programmed to naturally take in this amount of info through practice and experience, you'll naturally have regular moments of challenge that you'll learn to work through. If you're navigating peak hour traffic (early morning school time) I regard you as a hero, managing just getting in the car.
I'll let you in on a secret - just about every experienced driver keeps to them self moments where they've made questionable calls whilst driving (myself included). This is one of the reasons why experienced drivers appear to be perfect drivers. They're not really.
Important thing to remember: L platers and P platers wear the plates so that others know they're not experienced drivers. It is the responsibility of every road user to make allowances for people displaying plates. Anyone who doesn't factor in such consideration shouldn't be on the road in my opinion.
And 1 last tip: Don't let bullies (tailgaters) lower your vibe. They're inconsiderate arrogant twits. One of the methods I've adopted is - focus on the speed limit, stick to it best you can and if the fool behind you tries to bully you into going faster try thinking 'Nup, not interested in you pal, only interested in sticking to the speed limit!'
You are a brave legend and I admire you for undertaking the insane challenge of navigating today's roads. It really is a massive challenge so don't undersell yourself. You'll graduate into higher levels of confidence as you go. Every experience is a learning experience.