You can start your investment anytime but some reminders to remember.

Use your own money for investment because it will help you having better psychology in this volatile and uncertain market.
Don't invest if you can not afford losing your money.
Don't use any leverage for investment because with leverage, you will have risk of liquidation.
Invest in Bitcoin, forget about altcoins that will cause loss for your portfolio.

Invest with DCA strategy and with Bitcoin.
https://dcabtc.com/