Usually "comfort" bikes give you more of an upright sitting position. Less aerodynamic and fast, but more comfortable (while you start riding at least, forever for many) and gives you more confidence too.

You could also look towards cruisers, like Townies. They usually have very few gears (think 3 or 7) but they allow you to sit very low and to put your feet on the ground super easily. They also are extremely pretty

Keep reading this forum, make searches (see the "Search" button on top), read the articles on the TE web site, etc. You'll learn A LOT! You can also check out your local library for cycling books and magazines, that might help. But TE is the best source, and the less pretentious by far!!