Hallo guy from Portugal,
really fantastic that you will come to see Bielefeld and Arminia playing. Looking at the Chat GPT schedule above just a remark: Do not 100% rely on that. For example: The walk from Siegfriedplatz to the stadium entrance is not more than 15 min. E.g. against Bremen I stayed at the Siegfriedplatz with friends and beers until 1h before the game and we were on the stands 45 min before, which was perfect (we are standing, block 4). You should of course give yourself some more time in the stadium as a newbie.