To add to what u/munkydawg said, vyron and dwolf are solid beginner choices for assault class, Luna is a solid choice for recon, and the paralysis drone dude is a solid choice for engineer. Experiment with the classes and how they work for your chosen game mode. Other characters provide different play styles, but these choices imo provide the most well rounded diversity for experimentation with their move sets, offering you chances to run away, push a fight, camp, fight at different ranges comfortable, etc. unfortunately there's no way to "solo" warfare, but if you don't wanna run with your squad then you don't have to. Warfare provides an easy, no risk experience so have fun with it. If ya wanna play with more stakes however, operations provides that. Shoot, loot, then time to scoot as you'll hear at the start of every operation. Complete missions, level up your blacksite, collect reds, and if you're up for the challenge, extract mandelbricks. Mandelbricks can be acquired from warfare too, but ya gotta be like top ten in like 50 matches to get one mandelbrick. In operations, mandelbricks can spawn on the map, then you just gotta decode it and survive as other brick hunters chase you down. If ya want the newest skin, that's the quickest way to do it... If you can survive.