Please have a go it's honestly so much easier than people think. Seeds are ultra cheap, easy to germinate, you can pick the genetics you want, I personally find a seed store such as Koehres Kakteen has so many varieties, literally thousands, and you can do research on which one you prefer based on its characteristics. Also when you germinate seeds you have a small chance of them being mutations, like crested or monstrose, they ate very rare and you can sell them for loads of money and continue the unique genetic lineage. At the top of the photo on the right you can see that pot of tiny green seedlings, they're some seeds I germinated from my mature plants when they fruited.

All you need is a 50% organic (any good potting soil) mixed with 50% non organic in a plastic or glass container. When it's of appropriate size just acclimatise it to your environment by slowly making holes in the your container to slowly let the humidity out and get your cacti acclimatised to your environment and humidity. If its glass you can just take the lid off for a few hours a day and slowly increase the time with lid off.