@roger,
In some cases, paying a bit more to DIY is worth the lesson. You gain the knowledge about whether or not to try to attempt it again. I recall changing a kitchen sink faucet mechanism back 35 years ago when I bought my first home. My new wife was a bit shocked to hear swearing like that without seeing a Navy ship nearby.
Seriously, I never knew was inside a gear shift faucet with those little ball socket spring thingies. I thought I would learn how to reassemble it by what it looked like coming apart. This was in late-‘80s, well before Internet “how-to” videos were so prevalent.I never touched another faucet repair again unless it was for a drip 💧 repair.