Simple bookkeeping advice

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Hello everyone a complete newbie here, and about to close on a property soon. I was wondering if anyone had any advice on keeping track on income, expenses, Net operating expenses, Net operating income. I've seen some rent rolls while I was looking for houses and they seem very elaborate on spreadsheets etc. I was hoping to do my own books, I'm not real tech saavy, and I want to be organized, and efficient. Are there any simple programs that would be effective at this? Any and all suggestions are welcome.