1998 Honda Passport parking lights will turn on, but not my

So the first issue I saw was, one night when I was about to leave for work (at night) I went to turn on my headlights and they wouldn’t turn on with a couple times off and on, they turned on. Kind of weird. As time passed it would do it every once in a while until it became a constant issue. So that’s the first problem, the parking lights will come on, but not the headlights. Now here are all the problems. When my switch is on the on position for the headlight (headlights wont turn on) my starter wont crank. When I turn my headlight switch off my starter will work. My radio will not work at all. My blower fan for my heater when you turn it on, it turns on my dashboard lights, which by the way my dashboard lights don’t work either. Also kind of a weird issues, but it goes hand in hand with the electrical problem. When I first had the problem off and on, when I had the problem (headlights won’t turn on) my car wouldn’t go into overdrive. When the headlights would turn on it would go into overdrive, now that it is a constant problem my car will not shift into overdrive. And I think that’s about it.I can work on my own cars, I have had racecars, older trucks, but I wondering if this is out of my league, I called a few places and they want a $100 just to tell me I have a problem. Also I looked under the hood to look for any bare wires that might be grounded out. And by my fuse box under the hood coming out the box does have a few bare wires. Could this be the issue? Any help would be great, if it seems like a big problem I will suck it up and take it in. Thanks! Also, when the headlights wont turn on and I pop the hood I can hear a hum coming from somewhere under the hood.