Thanks.
Just Google : BTC/BCH/DGB/LCC/XEC (or whatever coin you want to mine) mining pool ; and do your own researches about the different pools you find.
If you want to know if a pool is ok, you have to start by looking if the type of payment scheme offered suits you, you can also check on an explorer that the pool actually mined the blocks it claims to have found, and it's very easy to find on the forum, or on Reddit for example, feedbacks on pools in the respective coins communities.
Also, I think you'll get more answers in the altcoins mining section of the forum.