You need to decide what you'll be using a bike for:

Short, fun rides to the store, nothing serious or long = hybrid. This is a bike with slightly raised handlebars, larger seat, road tires & fairly lightweight. Probably the cheapest of your options.

Some off road & some on road - you can probably get an MTB that is fairly light. I would not spend a lot of $$ for things like trick suspension since you'll probably not be bombing down hills.

More serious long road rides - definitely a road bike. The weight will be less than a hybrid, the positioning is more aerodynamic and you can get into an entry level bike fairly inexpensively.

Regarding bike fit - it depends on the shop.

If you are going to a small shop privately owned by cyclists, you can expect them to put your bike on a stand & watch you while you pedal to make sure that you're in a proper position. They might even use a "fit kit" or some other specialized way to make sure that your knees are in the proper angle, etc.

If you're going to a large chain shop, you can expect them to put your bike on a stand and chat with each other about last night's date while you pedal.

There is a wealth of information on this board. When you get ready to buy, check it out with the ladies here. You're sure to find somebody who has had experience with your type of bike.