I'm very impressed with your pictures, and pleased that you and your father have a hobby which you can share. He is quite obviously extremely good at it.
For several reasons, I sold off my model railway equipment more than twenty years ago. While rummaging through my stuff, I found some rolling stock which had somehow been left behind. I've still got two locomotives: a British diesel switch engine/shunter and a German-made model of a Belgian steam engine, as well as some freight cars - I couldn't be happier. I bought some lengths of straight track, so as to be able to display them in my bookshelf. As a further step, I'm going to buy enough track to make an oval on the carpet and organize a transformer.
I'm now seventy. Because of the lockdown here, I can't sit in the library or in a café reading, and its mostly still too cold to sit in the park. Watching my trains might sooth my nerves.
Keep at it!