Simple Questions

Please go to Help section. It is possible to mine even if you have no mining rigs.
As soon as the block is found you will get your reward. Please wait a little bit more time.
Since you start to mine your hashrate grows gradually. Please wait. The pool determines your hashrate based on the amount of shares sent by your mining rigs (workers). This value could be a little bit different from reported hashrate (in your mining software).
No. At the moment it is: 0.01 ZEC
PPLNS is a collective pool. Miners work together to find a block. When it is found they split the block reward based on their hashrate. At SOLO mining pool each miner works alone. However if he finds the block he gets the complete block reward himself.

Difficult questions

Transaction data is recorded in blocks. New transactions are being processes by miners into new blocks which are added to the end of the blockchain.
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It depends on amount of active miners. The more miners work on pool -> the more hashrate pool has -> the more blocks are found by the pool. However the more miners are active -> the less reward you get from each block found.
Mining is probabilistic in nature: if you find a block earlier than you statistically should on average you are lucky if it takes longer, you are unlucky. In a perfect World pool would find a block on 100% luck value. Less then 100% means the pool was lucky. More then 100% means the pool was unlucky.
Share is a possible valid hash for the block. Shares are beings sent by your rigs to the pool to prove their work. Check this article.
2Miners pool gives each miner a static difficulty at which the shares are being submitted. Check this article.