You need a lot of time for trading especially in the beginning phase because you have to study a lot. Maybe you can start with a training account and not directly with real invests. But I think its possible also to do it with a job e.g. in the morning / evening / weekend.
Lots of huge time! Studying is one and practising is another. Over time after studying, there is always the thing that comes with learning from mistakes which is normal. However, trading in itself is a whole lot of job which you apparently need a lot of focus unless you want to go the long term way. The emotions, the crazy decisions you have to take and some other pretty challenges is not a small thing to chew at once and i guess it is better to stick with a well paying job than trading.