Thank you man! I've been taking pictures for many years but unfortunately I have always used the Canon EOS cameras so I don't have that much experience from different brands. I could recommend the Canon cameras, 800d (smaller, hobby, beginner), 80d or 7d mark II (good for enthusiastic amateur), 5d mark III or EOS-1D X Mark II (professional) but if your looking for something a bit smaller you might have a problem. I read somewhere about the Sony Alpha A7R Mark II. The Sonys are known for being smaller but it's still a system camera with all the manual camera installations. I've heard alot of people liking the Sony cameras so you should look into that. If we're speaking even smaller compact cameras I'm not the right person to give you answers.
When it comes to lenses and restricted amount of space I would try to find one or two lenses that would work in as many situations as possible.

1. 35mm or 50mm lens is a great light sensitive and small lens that every photograph has in the bag :) The zoom is static in these but they give you great pictures when you're taking pictures in darker places but work everywhere. In this post I used the 50mm lens.
2. A zoom lens that takes wide pictures but can also zoom in if needed. This would be another safe choice that works in many situations. For example the Sigma 18-200mm lens.

Look up these on for example google or youtube and see what people are saying :)
There are my advises! Hope it was helpful!