If you're thinking about taking the plunge you should research dollar cost averaging.
Definitely, dollar cost averaging is the best way for most people to invest. Low stress and reliable.
If anyone is looking to sign up for Swan Bitcoin, which allows recurring BTC buys with lower fees than Coinbase or other apps (U.S. only), my referral link is https://www.swanbitcoin.com/dhimmel/. I think the link gives you $10 of BTC compared to nothing for a referral-less signup.
For Swan Bitcoin, I recommend the Pay as You Go option whose fees are 1.19 %. If you prepay fees a year in advance, then you can get a better rate at 0.99 %. But I want the option to pause DCA purchases should the BTC price exceed all time highs. And if you prepay fees, you could end up forfeiting those fees in the prepay situation.