Three things that decide how long it takes you
One: how many hours a week you actually spend
Actually, not intend to.
Most people work this out using an ideal week: no overtime, nothing unexpected, the children asleep on time. That week does not exist.
Work it out from the worst week instead. What you can still find in your worst week is your real pace.
Choosing the session and fitting it into a week is covered here: Which index suits someone with a full-time job?
Two: whether you write down every trade
The least practised of the three, and the one that decides the pace.
With no record, a year and a month come to the same thing — both leave you with zero trades of data and nothing but an impression. And the impression always leans towards the most recent loss.
With a record, three months later you can look back and see: which trades followed the rules and which did not, and whether the losing ones have something in common.
Spot the pattern and you have something to change. Miss it and all you can do is guess again.
The record does not need to be elaborate. Why you entered, why you exited, what happened. Three lines.
Three: whether you keep changing method
This one is the switch on the clock.
A few losses in a row and the first thought is always "this does not work". So you switch, and start again — then take a few more losses, and switch again.
Every switch resets the clock to zero.
Not because the new method is worse, but because you are back to holding three or four trades, which show nothing either.
Asking whether someone is honest about the time before you pay is part of the same question: How do you judge whether a trading course is worth it?