No, you can try our virtual node. We will give you our tokens for free to become a validator. Join chat:https://t.me/incognitochainru
There is all information how to start making money and become validator. You can also chat with people who have already done it.
As far as I understand, only testnet is running now?
If I start now a virtual node and become a validator, all mined coins will be lost or they will be converted to mainnet?
Yes, it is testnet, but 31 october will be mainnet and all coins you get during the test period will be converted to the mainnet.