You might get it wrong for the first month, however from the second month you'll start getting better at planning out your expenses and using funds judiciously to attend to it without being as wasteful as you can be when you don't plan for it and then you can keep getting better at both your cashflow management and may even consider increasing your level of aggressiveness in your periodic purchases.
Exactly, experience and application helps the learning process, including that if newbies do not want to lose money, then they start out conservatively and keep building their bitcoin investment. They should also accept that it could be possible that their bitcoin investment is in the negative for months or even for years, yet they can still keep chipping away at learning about bitcoin and continuing to build their bitcoin investment and also to develop conviction by ongoingly managing their finances and psychology, which may include choices to reinforce their bitcoin investment by buying bitcoin on a weekly basis - whether manually and/or setting up automatic buys.
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I think it is still better to wait until you are able to figure out your discretionary income which is your leftover after you have settled all important needs before you can start accumulating Bitcoin from your discretionary income, for it is wrong when you use money which is not your leftover income to invest in Bitcoin , investing from your discretionary income will enable you HODL your Bitcoin for long and it will also make you not to sell out when it's not yet your target time to sell because you are not using money meant for family needs or up keep to invest into Bitcoin because when you do so you will definitely sell out your Bitcoin even at lost when more needs may arise so no matter what it is important we have our discretionary income before coming up into investing in bitcoin.
Almost anyone should be able to figure out whether they have an extra $10 or not. If they cannot figure it out, then they have to figure it out...so once they figure out that they have an extra $10 they can get started, and they can sort out the other aspects of their potentially messy finances and/or psychology as they go. Position size can do a lot in terms of both starting out and also not overdoing it so that there are abilities to figure out an appropriate level of aggressiveness. I would thing that most people are going to start out investing into bitcoin in a non-aggressive way and work their way up towards being more aggressive, unless they happen to already have a pretty good grasp on their finances and they can understand and appreciate the strength of bitcoin's investment thesis from the start.