500$ to 1000$ is good start for a newbie in cryptocurrency. Try to invest in multiple coins, split your investment in 3 parts. This will reduce the risk of loss and try to hold your assets for a at least 6 months to one year.
I think I start investing now, by doing it right, buying now and being held for several years then you will get a big profit, don't make a mistake in selling then you will lose your money