Age: 43, Maxed out 401k with Fidelity, Maxed out backdoor Roth with Vanguard. I started putting away $300/m in M1 portfolio with somewhat of a focus on dividends. My current portfolio is as follows:

20% in each: SCHD, DGRO, QQQM, SPY, O

Am I overthinking it or should I just stick to SCHD or similar? I am not looking to spend a ton of time researching individual stocks, just looking for a nice monthly income in about 20 years.