I would recommend Bitcoin still even though you have a low capital.
I wonder how much capital you have. $10? $20? $50? I mean you can don't need to buy 1 whole Bitcoin because you can buy a smaller amount of it.
I will not recommend a particular coin aside from Bitcoin, but if you really don't want to buy Bitcoin (because of you having low capital), I would just say that put it into those top altcoins out there. Now if you're afraid to invest because you have low capital, find a way to increase that capital first then pick something that you want to invest your money with, or just simply buy Bitcoin to make things easier.
For those with little capital, investing in bitcoin or top alts doesn't make much of a difference. Maybe top atlcoins growth rate is higher than bitcoin but that will not be enough to make a clear difference.
Therefore, in my opinion, I agree with your opinion that OP should focus on increasing income and capital instead of thinking about where to invest, which coins to be able to earn big and quick profits. Because getting rich quickly from speculation is not easy and the price to pay is very high, he may lose all his little money.
He should look for ways to increase his income and invest regularly and consistently in bitcoin or top alts. That is the solution.