is it smart to gradually invest in Bitcoin (Weekly?) Or put more in sooner?

im brand new to this and am looking for advice to get going. i dont wanna risk all in at once but also wanna be able to invest at the right time. do i try to profit on altcoins then transfer the earnings to BTC over time? or invest right to bitcoin? and if im going right to bitcoin do i put more in now or would you say its safe to have a weekly plan? via /r/Bitcoin https://bit.ly/3DN8TF8