Yes the stratum URL should be the address where you point your miner and the BTC address is your username you can rename it like mybtcaddres.s19j or mybtcaddress and about the password, you can put any or just x it doesn't matter.
About using ipv4 and ipv6 you can also use this pool if your internet supports it and the only purpose is that it is for latency purposes low latency is a must.
Thanks so much for the quick response.
How do I determine if my ISP uses ipv4 or ipv6? I use Bell Fibe with 1.5 Gbps (fiber optic)