I used to be a financial advisor with Series 7 (stocks, options and mutual funds) and Series 66 (can charge just for advise) licenses.
I strongly recommend you read "A Random Walk Down Wall Street" by Malkiel.
That being said, most people tend to have unrealistic or contradictory expectations when it comes to investing.
There is no one size fits all portfolio or investment. Your time line, % of total investment this particular chunk of money represents, your expectations and adversity to risk all impact what the asset allocation (% of stocks, bonds and cash) of your portfolio should be. Bear in mind that mutual funds can be a basket of stocks, basket of bonds or basket of both.
You can find investor surveys/questionaires online that ask about 6-8 questions to determine your asset allocation. The more detailed the results e.g. 20% large cap value, 20% large cap growth, etc, the better.
The conundrum is finding a financial advisor worth a damn. Bear in mind that they are salemen first. At the Monday morning meetings, no one gets praised for their grasp of Modern Portfolio Theory or how much they increased a clients portfolio. They get praised for how much they sell.
That being said a relatively conservative portfilio can be had with a "balanced mutual fund". Those tend to have both stocks and bonds. I tend to favor passive aka index funds vs actively managed funds. Nothing comes for free. Actively managed funds have higher operating expense ratios (OER's) which means the fund manager takes a larger cut, but generally underperform their indices. In other words you're paying more for underperformance.
Sorry this isn't the classic "plastics" or "buy amalgamated flyswatter" advice most tend to look for, but the goal is to make money for you, not your broker.
I hope this helps. Also, be prepared for tons of advice that contradicts what I just said.