assalaamu alaykum ernie,

may Allah reward you adundently for this big step in your life, don't let people get you down and verbally beat you up over you reasons, people get interested in islam for all sorts of reasons but they stay for the pure teachings.

regarding shi'a islam, there are a few different types so it isnt straight forward. some are more mainstream than others, others advocate some beliefs which are in contradiction to Tawhid (pure monotheism) but to be honest with you so do many people who claim to be sunni!

take things really easy right now, learn the basics and built up slowly in your knowledge so you can begin to tell the good from the bad.

assalaamu alaykum,
Abu Abdillah