Most folks use 100 watts or less so you can talk to most people with the
same power level or less.
Antennas have the ability of amplifying the receiving station's signal to
you as well as your signal to them. (gain)
building and designing Antennas is a way to learn and and enjoy the hobby.
contrary to what some may say, you don't have to be an engineer to enjoy the
hobby.
If you need the amplifier (like on 80 meters at 9 pm when everyone is trying
to claim a freq for an impromptu net) - then its usually less stressful to
just switch it off until the band is less busy.