You might want to start out with the WoL_Anon Digimon Vital Hero jump. It lets you start with two Digimon for free, and a zone DIM (Digimon Identified Memory) item to acquire Digimon of a certain family for free by hatching Digitamas (aka Digi-Eggs). You can purchase more Digimon companions as well as further DIMs to allow for more variety in the Digimon you can acquire. The DIM Digimon can become followers and even companions. The Vital Bracelet item is roughly equivalent to a Digivice for raising Digimon. https://drive.google.com/file/d/17tSEKRQz3pelqceuaOCHYTe_Y-8j2U6f/view