First of all, you must determine if you really want this. After all, like other hobbies, modeling of this type requires you to desire and a little time. After all, after you master the skills, you can reflect almost any objects on paper.
What is modeling in general? Some may think that this origami. But no, in fact they differ from each other.
Origami is when you use only paper, and with the help of bends you create a masterpiece. And in my hobby, the range of materials is much wider, such as: paper (from whatman to simple A4), paper clips, transparent sheets (thick covers, etc.), as well as glue for combining all this (my advice is the most suitable PVA), and various devices (scissors, stationery knives, tweezers, etc.). Here are some examples:
Where to begin? As the saying goes, "Moscow wasn’t built right away," and in our case, if you had no business with paper before, start with simple models. My advice is to search the Internet for ready-made patterns for models, and choose a simple one to start with. Create a pair of simple objects, and when your hands adapt, move on to more complex ones. Thus, you will master the necessary skills, and in the future you will be able to create everything you want. For example, patterns for a motorcycle from the Internet:
What to create? Start with simple shapes, cubes, pyramids. Then collect models taken from the Internet. If you are friends with geometry, then this is a big plus. You can create complex models yourself, for example: various equipment, objects, animals, etc. Here are some examples:
For ideas, you can watch various films, where a lot of technology. Personally, I watched a lot of Discovery ropes. If you want to create yourself, you must learn to make patterns. To do this, you need to have at least some understanding of geometry. The best thing for beginners is to make parallelepipeds or cubes of different sizes, and assemble the parts as in LEGO, gluing them together.
In conclusion, I want to say that if you want to master this skill, you should practice and give yourself more complex and difficult tasks, expand the range of materials, otherwise you will not leave the cubes.