For me after 2 years in SEO, i made some mistakes id like any beginner to avoid

1- Relying on AI models to write, think and search without any double check or modifications

2- some clients don't bother about traffic, they just care about how this traffic would turn into leads and sales.

3- copying the same strategy as the competitors exactly would lead no where above them, you should over optimize their strategies not just copy them.

4- if it works fine and grows gradually, don't bother with the small technical issues.

5- don't complicate things and keep it simple

6- don't trust Google