Start with an account in M1Finance and start with following monthly payers to start getting dividends right away.
EPR, GAIN, MAIN, O, STAG have all raised their dividends over at least the last 5 years or more
O and EPR have high dividend safety, EPR and MAIN are currently reasonably priced
Then start researching dividend growth investing on youtube, seeking alpha, simply safe dividends, etc
If you want to get higher yields then learn about REITs and BDCs.
If is a taxable account and you plan to buy and hold until you die, then MLPs might be of interest, but do add complexity to tax filing.
Other traditional equities with high yields tend to be risky at best, in deep trouble at worst.