You have 2 stalks on the left side of the steering column. One is indicators and the other is the dip switch. I’m embarrassed that, having owned a dozen or more of this type of vehicle, I’m struggling to recall where the main headlight switch is. But I’ll guess that it’s a relatively small round switch just above your right knee when you’re sat in the seat. This is the switch you need to find and you’ll be sorted.
Good luck, Pete 