These are very good and sensible issues that you are considering. Simply put, people can trade successfully on any timeframe and with a huge range of strategies and approaches. But the reality is that the vast majority of traders do not make money whatever style they use!
Selecting one’s trading style is a very broad subject and is moulded by many factors. To start with there are your personal circumstances such as available capital, employment obligations, what time zone you live in, etc. Then there are you personal characteristics such as your ability to concentrate, maintain discipline, manage stress levels, etc. In addition to that, there are your personal interests in how you wish to trade. If you are interested in including fundamental analysis then longer term trading is more suitable. Afterall, government and central bank policies do not change hourly! But if you are interested in technical analysis then you can adapt this to suit any timeframe.
Intraday trading surely requires greater stress management, discipline, patience, and self-control. Longer term trading off daily charts, for example, allows greater strategic planning and potentially good results from long term trends. But that is not always quite so easy either since markets can move a long way in a day and if you happen to enter on the “wrong” day in the “wrong” direction then it can be very painful. This type of trading also needs greater room for the trades to “breathe” as the moves unfold and therefore you need wider stops and a greater level of capital in your account.
Then there is the choice between discretionary trading, where you personally evaluate each trade set-up before actually entering (and while it is still open), and (semi)automated trading, where you follow the signals mechanically and rely on the historical success of the method to produce a net gain over time.
Yet another major issue is whether you wish to trade for a full-time income or alongside your employment to earn capital for investment in other things such as a pension scheme or a share portfolio, etc. It is an entirely different world if you need to trade to pay the bills every month regardless of the market compared with just waiting for opportunities to trade and add to your capital whenever they happen to appear (and is not a major setback when they sometimes go wrong!)…
Some people are happy to carry open positions for long periods, whilst others prefer to trade on days when they feel ready to trade and/or they see something worth trading. One problem often stated by longer term traders is that they become “married” to a view or opinion even when the market is saying the opposite. Short term traders, by definition, are never hooked on a long term trade or view. But the corresponding problem here is that it is a rather contrarian human characteristic to swing rapidly from one direction to another and trade without logical reasoning behind it.
So, although you will get good comments here from other traders, ultimately you have to look within and see what suits your personality and circumstances best. it is good to trial these things on demo freely and see how it evolves.
You are clearly making the right moves here and I wish you good luck all the way!