Space Marine 2 Class

Hi i Just Started Space Marine 2 and im looking for some guide about what class shoud i choose and what weapons. After playing trials for every class i feel most confident with Bulwark and Heavy. Thing is that looking at so much weapons to choose from im feeling bit overwhelmed. I mostly play offline games to im stressed i will be pain for my team if i choose such important class as support or dps😅 Some advices would be helpfull too😄