I am not clear about altcoin system. I actually want to know about altcoin. I am new in digital currency market. So I want to know more about digital currency.
If you want to know more about cryptos, the best place is to read up on articles and
Google the coins you're interested to learn about. There are plenty of resources and there are no best ones out there, because there's no best one-stop solution.
Alternatively, news publications are a good start, with some below:
CoinTelegraphCryptonews