Initially when someone want to invest and is new then better to stay with the top altcoins only. Once people do make some money and profits form that investment then they can start exploring some other altcoins based on the needs and the risk appetite. Also one should have time horizon and accordingly should invest as its highly volatile market.
determining the plan for investment in the crypto market has considerable complexity. In addition to the analysis of the project, we must also determine the market analysis to determine the time and also the price. This is very difficult, but as a beginner, as you say. choosing a top market asset is the best choice with a risk that I think is quite small. at least they won't become 0. and we can learn how the crypto market moves to make a profit.