The most important thing is to start consistently, not the amount of Bitcoin. To start any investment, you should first have money, sufficient knowledge, or absolutely perfect market conditions.
You don't need to understand everything about Bitcoin before you invest in Bitcoin, and you don't need to start your investment in absolutely perfect market conditions because Bitcoin is highly volatile, and you don't know when the market will be favourable for you to start your Bitcoin investment. If you have a source of income that guarantees you discretionary income, you can adopt the DCA strategy and start your bitcoin investment weekly or monthly based on the one that is convenient for you,
and you need to set aside your backup funds or emergency funds. In case you have any emergency you didn't plan for, you can depend on your backup funds or emergency funds to solve your emergency, and it will not influence you to sell your bitcoin.It looks like you are confusing an emergency funds and backup funds as the same, no they are not bro, they are both instrumental to the security and growth of your Bitcoin holdings, but they didn't have the same functions.
An emergency funds is the money set aside to handle real life emergencies that threatens your Bitcoin holdings, or in other words you can say that it stands as the last layer of protection to your Bitcoin investment. You don't temper with it unless their is a real life emergency situation that threatens your Bitcoin holdings, unlike a backup funds. While a backup funds is money set's aside that can be used to service your other minor needs that is not part of your basic needs, but are very important, it can also be used to buy aggressively during the dip, so a backup fund and an emergency funds are not the same bro.
Let's not get things twisted here. I believe that an emergency funds is also a backup funds, because that's what you use to backup your bitcoin investment so that you don't sell your bitcoin when it's not of your will due to some unforeseen challenges that played out during your accumulation stage. This is why it's the emergency funds that we are to touch last whenever we have an unforeseen circumstances after exhausting our reserve funds.
Reserve funds is good to set up for buying bitcoin at the dip and for what I mentioned above. Both emergency funds and reserve funds should fall under the category of backup funds but they have their own different role to play. My thoughts.
This is why newbies are advised not to start building an emergency funds first before they later accumulate bitcoin because they don't have any bitcoin to backup with the emergency funds. Starting right away with your discretionary income is good and start building your emergency funds as you have started for backup to your bitcoin investment.