I bought my first house. The walls are plasterboard, which I’m not used to. I tried putting stuff up with regular rawl plugs which just spin and fall out. I’d like to mount my 50” tv on the wall but I’m looking for advice on what fixtures/ tools I’ll need. Research told me I need a stud detector, but have no idea what kind of rawl plugs will work for things like picture frames, or shelving.