Hepburn is not for foreigners learning Japanese. If you're learning Japanese you should start with hiragana and never use romaji in your learning.
Hepburn is for international use of Japanese names, for visitors (who might not learn Japanese if they're just doing a 2 weeks trip) and Japanese people abroad.
If you were Japanese in US (or Germany, or Russia), would you rather be Mr. Fujiwara from Kyushu or Mr. Huziwara from Kyusyu? What's going to get people to prononce your name as close as possible to your real name?
Hepburn is for international use of Japanese names, for visitors (who might not learn Japanese if they're just doing a 2 weeks trip) and Japanese people abroad.
If you were Japanese in US (or Germany, or Russia), would you rather be Mr. Fujiwara from Kyushu or Mr. Huziwara from Kyusyu? What's going to get people to prononce your name as close as possible to your real name?