As a Hanafi would it be wrong for me to raise my hands during salah?
The Hanafi opinion is that you shouldn’t do that, so if you respect the Hanafi school and try to follow their opinions then you shouldn’t raise your hand.
You may also research the topic yourself and follow the opinion that sounds best to you. In the past, the schools of jurisprudence (madhhabs) were like guilds. Those who belonged to a school had to act according to the scholars of that school in order to be accepted by the community around the school, and the scholars themselves had to strictly adhere to the school, otherwise would have lost their jobs as teachers in the madrasas and imams in school-associated mosques. But the guild-like nature of the schools has today disappeared in many parts of the world today, especially in large, cosmopolitan cities. People instead follow the opinions of the scholars they respect most without caring very much about the scholar’s school, and the scholars themselves often combine opinions from multiple schools.
Ideally, Muslims should follow the opinions that have the most reliable evidence behind them regardless of what school the opinion comes from. But we cannot all research each and every topic as that would take most of our time, so in general it is reasonable to follow the opinions of scholars you know and respect.