Keep it simple.

First work out your budget for the body and lens - then decide if you want to buy new or a good second hand model. I say this because depending on the model you can buy a camera body second hand for around 60 - 90% of new (even less if you buy a superseded model). Once you have a body, there is a chance this will come with a kit lens. If you are just starting out then I would suggest that is all you need to take the photos you have linked.

Once you have a couple of months under your belt and you are more aware of your distance to subject (and you have a body) you will be in a better position to call on help to decide which lens best suits your needs.

Just my 2c worth of advice.