This. Although, to be perfectly honest, if you're not scared of making mistakes (and if the rest of the fireteam is cool with it, ofc), it's almost more fun to have them teach you as you go along. Plus it leads to hilarious moments where they forget to tell you some small detail and it leads to your gruesome demise. Like the fact that the lamps explode if you stand near them for too long. Scared the bejeezus out of me, much to everyone's general amusement xD