Self-hosted mobile operator at home

I'm interested in starting my own mobile operator at home. I'm somewhat knowledgeable about programming and PCs in general, but I haven't delved into this topic yet. I'd like to clarify a few points that interest me: - Is it even possible to build 1G-5G networks legally using the required frequencies (I live in Russia)? If not, are there any alternatives? - What networks from 1G to 5G are generally possible to implement? - What equipment do I need? (SIM cards, antennas, etc.) - What software do I need for each type of network? - Are there any ready-made guides? Let me clarify that I simply want to see firsthand how cellular communications work; I'm not planning on installing anything out of my apartment. If you have any questions about what I'm looking to do, please ask. Translated to English using Google Translator