If I may impart my 3 cents from what I have learned in my writing journey so far:
1. Show don't tell.
When I first started, it was helpful to ground my writing. It helped me remind myself when I oversimplified actions in my writing where I could elaborate more. But when I keep writing, learning, and establishing my style, I do realize it's not all there is to it. Sometimes it's better to tell rather than show, especially when I want to make the scene more fast-paced. I do my best to 'show' on important scenes, descriptions, and areas where I need the pace to slow down and soak everything in. I have no problem using 'tell' on less important scenes and filler actions. All in all, show don't tell isn't as absolute as how it's hailed to be, but rather, it's an aspect a writer should balance with their style.
2. Dialogue tags.
On one hand, I agree that using said too much isn't good but using over-fancied ones is also just as bad. Again, it's about balance. 'Said' and other commonly used ones should be fine to use once or twice per chapter. Personally, if it's followed by an action afterwards, I simply yeet it out of the sentence and use the action as the dialogue tag because it changes nothing. If there is a more descriptive alternative than 'said' that can give more information to the character, setting, or emotion, then by all means, you should use that instead. But if you just want to use fancier words to fill in the gaps, then 'said' or 'asked' is probably the better choice.
3. Write for yourself.
I agree with this one. Maybe, to be more accurate: Write what you want to read. If you can't like your own story, if you don't want to read your own story, then who will? As narcissistic as it may sound, you should be the first fan of your story. I believe the love you have for your story will be reflected in your writing.
That is all for my 3 cents. If you're still here, thank you for reading until the end
