As a young investors you don't need a million dollar before you investing I Bitcoin, you can start by investing $200,$300,$500 everyday for 2 or 3 years, and you'll be a millionaire, and I know today that is how most people start up there Bitcoin investment journey and today they are millionaires, so that is also a way for the young investors to start their investment journey, thank you.
Op actually gradually investment can help investor accumulate a huge BTC mostly if the investor happened to be a Long term Holder while is Will and ready to take advantage of the market mostly when there is a dip or correction, but the amount you made mentioned to be used not all beginner can afford such even those who are strong investor is not easy to raise such per day is like investing one million like you said one don't need to start with, for my opinion any new investor who can afford 100 dollar,200dollar weekly with any challenge after taking off emergency fund and others responsibility is okay to start up with.
if the investor could invest for the complete 52weeks in a year it will a very huge investment if he don't temper with it for seek emotional or any other challenges as the case may be, such investor can desire to increase it the next year after weighing itself and having planted other sources of income.