Some beginners do not have any idea on Bitcoin investment or any strategy they can use to accumulate Bitcoin in to their portfolio during the month but they still choose to get started cause they believe that the earlier they start investing on Bitcoin the earlier they also get knowledge about Bitcoin and the kind of strategy they could use to keep on accumulating more Bitcoin. However at first they may think to invest little amount but as time goes and they begin to understand the process of Bitcoin investment, they might decide to increase the amount they are investing on Bitcoin (many from $10 to $50 weekly). Weekly Bitcoin investment is kind of better than monthly investment but it depends if the investor is getting money every week.
This is why in most cases is always advised that you understand and study about the Dynamics on how the market works before you start your BTC investment journey, because hence you understand how to strategize your accumulation, any decision that will be taken will be an informed decision. A beginner is supposed to study the market carefully before knowing the strategy he/she is to use that will best suit him/her because you don't test the depth of a river with your two feet.
A beginner should first of all look at his/her income before choosing a strategy, so that by the time you start your accumulation, you won't find difficulties on how to be persistent.
Well, having deep knowledge about certain things is good, but in this case a beginner don't need to do much findings about the market before they invest in bitcoin cause it's something they'll get to understand on the long run, so far one has made up their mind, seperate their discretionary funds from that meant for investment and think long-term then they're good to go, the most important thing about Bitcoin is having money to follow it up, once a new investor got that settled then every other things would fall in place including knowledge about Bitcoin investment cause even though you do the wrong thing you'll learn from your mistake on the long run and take corrections but when you're not able to invest nor even have money for investment then such knowledge can't even be put to good use, you'll be learning while others who don't even have knowledge compared to yours are staking their portfolio and doing it at a cheaper rate. I like where you said a beginner should first look for his/her income before looking for a strategy, not just income but funds to invest with cause one can have income but their expenses are too much to handle both discretionary funds and that meant for investment so until the person got it sorted out then their good to start their investment journey.