Different hops, in different amounts, at different times, bring different things to the party.
Timing
Early boil hops will give you mostly bitterness, and subtle amount of flavor and aroma, typically lesser amounts are needed.
Middle of the boil hops will bring a bit of each, to a point larger amounts bring more of each.
Late boil hops will bring mostly flavor, some aroma, and a bit of bitterness, again to a point more hops bring more of each
Hops added as a hop stand or whirlpool (after the boil ends) will bring a lot of flavor and aroma, and a subtle amount of bitterness, the amount of bitterness is dependent on the hop stand temperature. Hotter will be more bitter, and again more = more...
Then there are dry hop additions, added to the fermenter. These additions bring mostly aroma, some flavor, and virtually no bitterness.
Amount of Hops
This is very dependent on what you are brewing, there is no magic pill here.
Hop Variety
As
@Sunfire96 notes Warrior is best used as a bittering hop, Magnum is my go to for bittering for an IPA.
Chinook is a classic for a west coast IPA.
I have used Idaho 7 in an IPA and loved it, I think it would work really well in a NEIA as well.
Azzaca, at least for me is best suited for a NEIPA.
I haven't used any of the other hops listed there.
It is amazing what different hops can bring to a beer when added at the appropriate time.
Not to say don't ask here and just to google it, but google is a good resource for getting quick info on a particular hop.
If you are a new brewer, my recommendation would be to go with a published, or tried and true recipe. If you are then looking at substituting hop varieties from what you have just google and compare.
Of course, we are here to help with that if you like, feel free to post your questions, we all love talking about beer and brewing.
Good luck!
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