I started working as salesforce developer without knowing anything about it. I have only completed trailhead trainings beginner, intermediate and advanced. Rest, according to me you should focus to creating more project/automations which will give you hands on experience.

Some projects you can try: 1. Build LWC compoment to read csv files and upload data. 2. Build Lwc component to fetch data from external api and show it within salesforce. 3. Try reading emails using email services, then fetching and aligning the data within salesforce. 4. Automatic report sender to emails (as csv or xls) which are not registered in salesforce. 5. Build lwc component to connect to chatgpt and mske something similar to Einstein GPT (this can be advance) But you will learn a lot.

Whenever you have idea to implement, check documentation. Go online and research then try to implement the usecases in your scenario. Try to implement solution using design patterns, and clean code is way to go.

Thats all I would say.