To learn a skill you need constant practice .
If a setup you select produces say 50 trades a month, you will have a lot of feedback on what is working and what is not.
If the setup you select has 10 trades in a year, then you will need 5 years to have enough experience to understand and perfect what works.
Performance improves with more practice and feedback.
Long-duration trades take months or a year for you to get feedback. As a result learning curve will be longer.
Very few traders think through this issue at the start of their career and as a result, spend years going nowhere.
Your timeframe of trading is the most important decision that will determine how fast you can become profitable.