I was late to start Dollar cost averaging in Crypto but even a painless amount of $10 per week does accumulate very well.
Try this DCA calculator at https://www.costavg.com/
The growth is impressive you can see here if having purchased only $10 per week in Bitcoin starting in January this year.

Give the calculator a try with your own comfortable parameters

Man if I only started years ago but hey time flies and a decent stack will build.
Rate in this example is 16.85% better than just holding cash.
Of course Crypto is volatile and risky and results will vary
so invest responsibly.