HELP THIS NEW FISHERMAN

I just unlocked t8 fishing with 70lvl on specialist

I wanted to ask some general questions

Like where should I look to fish like t7 or t8

Are any biome better than the other, like the 3 biomes i have fished in are highlands forrest and swamp

Do region quality matters

Are t8 boss maps better than normal t8 maps

Also will be using t8 set with miner boots

Thank you very much:)