you can always check the coin's website, white paper, source code. and also you can also always search any question you have and read the answer people give on the forum or better answers on stackoverflow.com or stackexchange.com if they have a section (which ethereum has).
and as for your question, yes it is true. ethereum has no cap and currently the mining reward is huge. it is about 25,880 ETH every day and that is 14 times more than bitcoin's daily total reward.
take a look at this for more stats:
https://bitinfocharts.com/this design however is good because ether was never supposed to a currency and was never supposed to be traded like this!
ether is a token which is supposed to be used for smart contracts not as a currency, which is why it needs to be created this much. but when they treat it as a currency and then trade it like that, all the problems with that shows up. the model becomes flawed in this case.