“I sucked in the past trying to time the markets.”
Ditto.
Timing is almost never a winners game. Choose a comfort level of either aggressive, moderate (balanced) or conservative, buy accordingly, rebalance as necessary, reinvest all distributions and sit tight.
I have done this for over 40 years and it has worked out fine bringing me an after tax income of just under 9% annually on average.
Hold on and enjoy the ride.