I've made plenty of mistakes! You will too.
One thing I will argue is that while quality is worth paying for, you need to temper that with the knowledge that you're in over your head at first.
For example, my first stove was a micro rocket. Great stove! But it turned out I mostly use stoves for melting snow & making freeze dried food, neither of which it excels at.
Not to mention, I learned how to fit packs incorrectly, so my first pack was a great pack, but too big!
(I could go on)
So drag your feet. Try to put off purchases until you have a better idea what you really need.