After joining a team and receiving your first digimon, you'll be given a mission to head to SCSI Domain and take down the wild boss. After getting your mission and leaving the room, you'll be introduced to your rival, Bertran. After talking, there will be vendors to the left and right of the room. Check them out. They have items for your Digi-Beetle, your digimon, and even items to catch digimon with. After you're done shopping, it's time to go to SCSI domain. Head back to the town map and head to the Main Gain, talk to Carol and head to SCSI Domain.
SCSI Domain
Rooms: 4 This domain is pretty much easy. Each room has only one type of digimon it inhabits (Vaccines are in the first room, Virus in the second room, and Data in the third room). Here would be a good time to start catching digimon. To catch a digimon, you must have a gift. You can get them at your team headquarters. Once you have a gift, look for a digimon you want to get (Determining on what team you joined, you can obtain only one certain type of digimon until later on the game where you can get any of the three types of digimon. So if you want Gabumon, a data type digimon, and you joined Gold Hawk, you can't obtain Gabumon since You can only get Vaccine type digimon.) Once you obtained more digimon for your party, it would be wise to train them for the upcoming boss battle. The boss isn't going to be easy. Once you reached the final room. Head straight up and prepare for a boss batte.
Boss: Hagurumon
Hagurumon is pretty easy for a boss if you trained your digimon to level 3 or 4. If you chose Gold Hawk for your team, good choice. the boss is a virus and since your digimon are Vaccine, (because Virus are weak to Vaccine and take more damage), this makes the boss seem like a piece of cake.
Once Hagurumon is defeated return back to your leader and mission complete